/usr/bin/java -Xmx8000000000 -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-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:14:13,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:14:13,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:14:13,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:14:13,869 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 [2021-07-09 17:14:13,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:14:13,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:14:13,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:14:13,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:14:13,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:14:13,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:14:13,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:14:13,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:14:13,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:14:13,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:14:13,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:14:13,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:14:14,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:14:14,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:14:14,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:14:14,167 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:14:14,168 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:14:14,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-07-09 17:14:14,168 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-07-09 17:14:14,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:14:14,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:14:14,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:14:14,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:14:14,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:14:14,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:14:14,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:14:14,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:14:14,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:14:14,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/1) ... [2021-07-09 17:14:14,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:14:14,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:14:14,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:14:14,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:14:14,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (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 [2021-07-09 17:14:14,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:14:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:14:14,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:14:14,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:14:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:14:14,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:14:14,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:14:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:14:14,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:14:14,285 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:14:14,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:14:14,491 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:14:14,491 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:14:14,491 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:14:14,492 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:14:14 BoogieIcfgContainer [2021-07-09 17:14:14,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:14:14,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:14:14,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:14:14,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:14:14,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:14:14" (1/2) ... [2021-07-09 17:14:14,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aa12f7 and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:14:14, skipping insertion in model container [2021-07-09 17:14:14,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:14:14" (2/2) ... [2021-07-09 17:14:14,498 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-07-09 17:14:14,501 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:14:14,502 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:14:14,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:14:14,502 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:14:14,536 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:14:14,558 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:14:14,580 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:14:14,580 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:14:14,580 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:14:14,580 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:14:14,580 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:14:14,580 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:14:14,580 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:14:14,580 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:14:14,587 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-09 17:14:14,596 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) 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) [2021-07-09 17:14:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) 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) [2021-07-09 17:14:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-09 17:14:14,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:14,602 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:14,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-07-09 17:14:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731243491] [2021-07-09 17:14:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:14,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:14,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731243491] [2021-07-09 17:14:14,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731243491] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:14:14,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:14:14,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:14:14,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708654416] [2021-07-09 17:14:14,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:14:14,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:14:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:14:14,745 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) 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) 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) [2021-07-09 17:14:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:14,766 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-09 17:14:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:14:14,768 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 [2021-07-09 17:14:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:14,776 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:14:14,776 INFO L226 Difference]: Without dead ends: 19 [2021-07-09 17:14:14,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:14:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-09 17:14:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-09 17:14:14,802 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) [2021-07-09 17:14:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-09 17:14:14,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-09 17:14:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:14,803 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-09 17:14:14,804 INFO L483 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) [2021-07-09 17:14:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-09 17:14:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:14:14,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:14,805 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:14,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:14:14,806 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:14,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-07-09 17:14:14,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:14,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206769792] [2021-07-09 17:14:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:14,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206769792] [2021-07-09 17:14:14,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206769792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629622614] [2021-07-09 17:14:14,871 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 [2021-07-09 17:14:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:14:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629622614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 17:14:15,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158525931] [2021-07-09 17:14:15,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:14:15,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:14:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:14:15,006 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) [2021-07-09 17:14:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,041 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-09 17:14:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:14:15,042 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 [2021-07-09 17:14:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,043 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:14:15,043 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:14:15,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:14:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:14:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-09 17:14:15,057 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) [2021-07-09 17:14:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-09 17:14:15,057 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-09 17:14:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,058 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-09 17:14:15,058 INFO L483 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) [2021-07-09 17:14:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-09 17:14:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:14:15,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,058 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:15,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:14:15,269 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-07-09 17:14:15,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:15,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639902579] [2021-07-09 17:14:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:15,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639902579] [2021-07-09 17:14:15,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639902579] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:14:15,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:14:15,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:14:15,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208701169] [2021-07-09 17:14:15,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:14:15,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:14:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:14:15,315 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) [2021-07-09 17:14:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,341 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-09 17:14:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:14:15,342 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 [2021-07-09 17:14:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,346 INFO L225 Difference]: With dead ends: 22 [2021-07-09 17:14:15,346 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:14:15,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:14:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:14:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:14:15,351 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) [2021-07-09 17:14:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-09 17:14:15,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-09 17:14:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,353 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-09 17:14:15,353 INFO L483 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) [2021-07-09 17:14:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-09 17:14:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:14:15,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:15,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:14:15,353 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-07-09 17:14:15,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:15,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875215967] [2021-07-09 17:14:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875215967] [2021-07-09 17:14:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875215967] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:14:15,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:14:15,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:14:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819827440] [2021-07-09 17:14:15,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:14:15,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:14:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:14:15,385 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) [2021-07-09 17:14:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,396 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-09 17:14:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:14:15,397 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 [2021-07-09 17:14:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,397 INFO L225 Difference]: With dead ends: 20 [2021-07-09 17:14:15,397 INFO L226 Difference]: Without dead ends: 20 [2021-07-09 17:14:15,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:14:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-09 17:14:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-09 17:14:15,399 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) [2021-07-09 17:14:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:14:15,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:14:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,400 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:14:15,400 INFO L483 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) [2021-07-09 17:14:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:14:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:14:15,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,400 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:15,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:14:15,400 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-07-09 17:14:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:15,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819664794] [2021-07-09 17:14:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:15,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819664794] [2021-07-09 17:14:15,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819664794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252387066] [2021-07-09 17:14:15,433 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 [2021-07-09 17:14:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:14:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252387066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:15,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:14:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274982915] [2021-07-09 17:14:15,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:14:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:14:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:14:15,484 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) [2021-07-09 17:14:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,493 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-09 17:14:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:14:15,494 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 [2021-07-09 17:14:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,494 INFO L225 Difference]: With dead ends: 24 [2021-07-09 17:14:15,494 INFO L226 Difference]: Without dead ends: 24 [2021-07-09 17:14:15,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:14:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-09 17:14:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-09 17:14:15,496 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) [2021-07-09 17:14:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-09 17:14:15,496 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-09 17:14:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,496 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-09 17:14:15,496 INFO L483 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) [2021-07-09 17:14:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-09 17:14:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:14:15,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,497 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:15,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:15,718 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-07-09 17:14:15,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:15,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542836849] [2021-07-09 17:14:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:15,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542836849] [2021-07-09 17:14:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542836849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956201832] [2021-07-09 17:14:15,780 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 [2021-07-09 17:14:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:15,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:14:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:15,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956201832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:15,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:14:15,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929444715] [2021-07-09 17:14:15,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:14:15,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:14:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:14:15,909 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,950 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:14:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:14:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:14:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,951 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:14:15,951 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 17:14:15,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:14:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 17:14:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-09 17:14:15,953 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) [2021-07-09 17:14:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-07-09 17:14:15,954 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-07-09 17:14:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,954 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-07-09 17:14:15,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-07-09 17:14:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:14:15,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,954 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:16,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:16,167 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-07-09 17:14:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:16,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215983056] [2021-07-09 17:14:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:16,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:16,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215983056] [2021-07-09 17:14:16,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215983056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741414578] [2021-07-09 17:14:16,235 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 [2021-07-09 17:14:16,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:14:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:14:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741414578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:16,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:14:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988288121] [2021-07-09 17:14:16,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:16,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:16,334 INFO L87 Difference]: Start difference. First operand 28 states and 51 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) [2021-07-09 17:14:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:16,368 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-07-09 17:14:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:14:16,368 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 13 [2021-07-09 17:14:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:16,369 INFO L225 Difference]: With dead ends: 32 [2021-07-09 17:14:16,369 INFO L226 Difference]: Without dead ends: 32 [2021-07-09 17:14:16,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-07-09 17:14:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-07-09 17:14:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-07-09 17:14:16,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-07-09 17:14:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:16,371 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-07-09 17:14:16,371 INFO L483 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) [2021-07-09 17:14:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-07-09 17:14:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:14:16,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:16,372 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:16,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:16,573 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-07-09 17:14:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736648167] [2021-07-09 17:14:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736648167] [2021-07-09 17:14:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736648167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076729420] [2021-07-09 17:14:16,616 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 [2021-07-09 17:14:16,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:16,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:16,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:14:16,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:16,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:16,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:16,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:14:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:16,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076729420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:16,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:14:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325949186] [2021-07-09 17:14:16,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:16,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:16,844 INFO L87 Difference]: Start difference. First operand 32 states and 59 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) [2021-07-09 17:14:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:16,922 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-07-09 17:14:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:16,923 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 14 [2021-07-09 17:14:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:16,926 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:14:16,926 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 17:14:16,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 17:14:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-07-09 17:14:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-07-09 17:14:16,938 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-07-09 17:14:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:16,938 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-07-09 17:14:16,938 INFO L483 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) [2021-07-09 17:14:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-07-09 17:14:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:14:16,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:16,938 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:17,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:17,141 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-07-09 17:14:17,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:17,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323012496] [2021-07-09 17:14:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:17,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:17,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323012496] [2021-07-09 17:14:17,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323012496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103739721] [2021-07-09 17:14:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:17,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:14:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:17,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:14:17,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:14:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:17,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103739721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:17,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:14:17,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217810498] [2021-07-09 17:14:17,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:17,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:17,372 INFO L87 Difference]: Start difference. First operand 44 states and 94 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) [2021-07-09 17:14:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:17,424 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-07-09 17:14:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:17,425 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 14 [2021-07-09 17:14:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:17,425 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:14:17,425 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:14:17,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:14:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-07-09 17:14:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-07-09 17:14:17,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-07-09 17:14:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:17,429 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-07-09 17:14:17,429 INFO L483 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) [2021-07-09 17:14:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-07-09 17:14:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:14:17,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:17,430 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:17,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:17,637 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-07-09 17:14:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:17,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008884861] [2021-07-09 17:14:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:17,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:17,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008884861] [2021-07-09 17:14:17,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008884861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580184845] [2021-07-09 17:14:17,678 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 [2021-07-09 17:14:17,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:14:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:17,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:14:17,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:17,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:17,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:14:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:17,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580184845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:17,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:17,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:14:17,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287119633] [2021-07-09 17:14:17,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:17,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:17,855 INFO L87 Difference]: Start difference. First operand 51 states and 119 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) [2021-07-09 17:14:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:17,908 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-07-09 17:14:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:17,908 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 14 [2021-07-09 17:14:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:17,909 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:14:17,909 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:14:17,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:14:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-07-09 17:14:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-07-09 17:14:17,912 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-07-09 17:14:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:17,913 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-07-09 17:14:17,913 INFO L483 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) [2021-07-09 17:14:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-07-09 17:14:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:14:17,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:17,913 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:18,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:14:18,122 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-07-09 17:14:18,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:18,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302979311] [2021-07-09 17:14:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:18,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:18,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302979311] [2021-07-09 17:14:18,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302979311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:18,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867227418] [2021-07-09 17:14:18,150 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) [2021-07-09 17:14:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:18,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:18,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:18,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:14:18,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:18,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:18,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:18,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:14:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:18,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867227418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:18,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:18,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:14:18,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039147204] [2021-07-09 17:14:18,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:18,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:18,305 INFO L87 Difference]: Start difference. First operand 59 states and 147 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) [2021-07-09 17:14:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:18,359 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-07-09 17:14:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:18,360 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 14 [2021-07-09 17:14:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:18,361 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:14:18,361 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 17:14:18,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 17:14:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-07-09 17:14:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-07-09 17:14:18,364 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-07-09 17:14:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:18,364 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-07-09 17:14:18,364 INFO L483 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) [2021-07-09 17:14:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-07-09 17:14:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:14:18,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:18,365 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:18,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:14:18,582 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-07-09 17:14:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:18,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367685349] [2021-07-09 17:14:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367685349] [2021-07-09 17:14:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367685349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666871615] [2021-07-09 17:14:18,612 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 [2021-07-09 17:14:18,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:18,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:18,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:14:18,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:18,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:18,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:18,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:14:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666871615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:14:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359077723] [2021-07-09 17:14:18,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:18,775 INFO L87 Difference]: Start difference. First operand 68 states and 178 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) [2021-07-09 17:14:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:18,835 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-07-09 17:14:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:18,836 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 14 [2021-07-09 17:14:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:18,836 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:14:18,836 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:14:18,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:14:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-07-09 17:14:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-07-09 17:14:18,840 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-07-09 17:14:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:18,840 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-07-09 17:14:18,840 INFO L483 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) [2021-07-09 17:14:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-07-09 17:14:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:18,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:18,841 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:19,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:14:19,056 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-07-09 17:14:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:19,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709430040] [2021-07-09 17:14:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709430040] [2021-07-09 17:14:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709430040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897693662] [2021-07-09 17:14:19,104 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 [2021-07-09 17:14:19,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:14:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897693662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:19,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:19,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066589686] [2021-07-09 17:14:19,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:19,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:19,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:19,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:19,160 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:19,231 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-07-09 17:14:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:14:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:19,233 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:14:19,233 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:14:19,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:14:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-07-09 17:14:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-07-09 17:14:19,237 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-07-09 17:14:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:19,237 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-07-09 17:14:19,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-07-09 17:14:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:19,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:19,238 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:19,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:19,457 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:19,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-07-09 17:14:19,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:19,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969006738] [2021-07-09 17:14:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969006738] [2021-07-09 17:14:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969006738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69004556] [2021-07-09 17:14:19,495 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 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 [2021-07-09 17:14:19,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69004556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:19,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:19,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522484236] [2021-07-09 17:14:19,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:19,558 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:19,667 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-07-09 17:14:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:14:19,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:19,669 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:14:19,669 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:14:19,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:14:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-07-09 17:14:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-07-09 17:14:19,672 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-07-09 17:14:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:19,672 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-07-09 17:14:19,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-07-09 17:14:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:19,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:19,673 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:19,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 17:14:19,885 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-07-09 17:14:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:19,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006761781] [2021-07-09 17:14:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006761781] [2021-07-09 17:14:19,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006761781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474513071] [2021-07-09 17:14:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:19,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:14:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474513071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:19,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:19,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50872459] [2021-07-09 17:14:19,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:19,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:19,992 INFO L87 Difference]: Start difference. First operand 98 states and 265 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) [2021-07-09 17:14:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:20,082 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-07-09 17:14:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:20,083 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 [2021-07-09 17:14:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:20,085 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:14:20,085 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:14:20,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:14:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-07-09 17:14:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-07-09 17:14:20,090 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-07-09 17:14:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:20,090 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-07-09 17:14:20,090 INFO L483 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) [2021-07-09 17:14:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-07-09 17:14:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:20,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:20,091 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:20,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:20,301 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-07-09 17:14:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:20,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335954750] [2021-07-09 17:14:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:20,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335954750] [2021-07-09 17:14:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335954750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87918414] [2021-07-09 17:14:20,339 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 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 [2021-07-09 17:14:20,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:14:20,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:20,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87918414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:20,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:20,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565761896] [2021-07-09 17:14:20,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:20,413 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-07-09 17:14:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:20,477 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-07-09 17:14:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:20,477 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 [2021-07-09 17:14:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:20,478 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:14:20,478 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:14:20,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:14:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-07-09 17:14:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-07-09 17:14:20,481 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-07-09 17:14:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:20,481 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-07-09 17:14:20,481 INFO L483 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) [2021-07-09 17:14:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-07-09 17:14:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:20,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:20,482 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:20,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:14:20,682 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-07-09 17:14:20,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:20,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306916413] [2021-07-09 17:14:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:20,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:20,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306916413] [2021-07-09 17:14:20,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306916413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110663598] [2021-07-09 17:14:20,716 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 [2021-07-09 17:14:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:20,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110663598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:20,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:20,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472250328] [2021-07-09 17:14:20,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:20,777 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-07-09 17:14:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:20,826 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-07-09 17:14:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:14:20,826 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 [2021-07-09 17:14:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:20,827 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:14:20,827 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:14:20,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:14:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-07-09 17:14:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-07-09 17:14:20,830 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-07-09 17:14:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:20,830 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-07-09 17:14:20,830 INFO L483 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) [2021-07-09 17:14:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-07-09 17:14:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:20,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:20,830 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:21,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:21,045 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:21,045 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-07-09 17:14:21,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:21,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164140479] [2021-07-09 17:14:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:21,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164140479] [2021-07-09 17:14:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164140479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428544267] [2021-07-09 17:14:21,082 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:21,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:21,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428544267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:21,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:21,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983473419] [2021-07-09 17:14:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:21,151 INFO L87 Difference]: Start difference. First operand 104 states and 279 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) [2021-07-09 17:14:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:21,226 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-07-09 17:14:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:21,226 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 [2021-07-09 17:14:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:21,227 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:14:21,227 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:14:21,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:14:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-07-09 17:14:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 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) [2021-07-09 17:14:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-07-09 17:14:21,230 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-07-09 17:14:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:21,230 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-07-09 17:14:21,230 INFO L483 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) [2021-07-09 17:14:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-07-09 17:14:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:21,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:21,231 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:21,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:14:21,445 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-07-09 17:14:21,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:21,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106313424] [2021-07-09 17:14:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:21,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106313424] [2021-07-09 17:14:21,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106313424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123082500] [2021-07-09 17:14:21,480 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) [2021-07-09 17:14:21,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:14:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:21,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:21,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123082500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:21,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:21,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578218931] [2021-07-09 17:14:21,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:21,563 INFO L87 Difference]: Start difference. First operand 110 states and 301 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) [2021-07-09 17:14:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:21,634 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-07-09 17:14:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:21,634 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 [2021-07-09 17:14:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:21,635 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:14:21,635 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:14:21,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:14:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-07-09 17:14:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-07-09 17:14:21,638 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-07-09 17:14:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:21,638 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-07-09 17:14:21,642 INFO L483 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) [2021-07-09 17:14:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-07-09 17:14:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:21,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:21,642 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:21,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:21,861 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-07-09 17:14:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:21,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650448577] [2021-07-09 17:14:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:21,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650448577] [2021-07-09 17:14:21,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650448577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638968114] [2021-07-09 17:14:21,893 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 [2021-07-09 17:14:21,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:21,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638968114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:21,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:21,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:21,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110127864] [2021-07-09 17:14:21,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:21,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:21,962 INFO L87 Difference]: Start difference. First operand 110 states and 300 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) [2021-07-09 17:14:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:21,995 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-07-09 17:14:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:21,996 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 [2021-07-09 17:14:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:21,996 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:14:21,996 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:14:21,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:14:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-07-09 17:14:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-07-09 17:14:21,999 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-07-09 17:14:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:22,000 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-07-09 17:14:22,000 INFO L483 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) [2021-07-09 17:14:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-07-09 17:14:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:22,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:22,000 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:22,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:14:22,218 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-07-09 17:14:22,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:22,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568012222] [2021-07-09 17:14:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:22,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568012222] [2021-07-09 17:14:22,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568012222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449339590] [2021-07-09 17:14:22,257 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 [2021-07-09 17:14:22,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:14:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:22,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449339590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:22,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:22,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:22,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42969212] [2021-07-09 17:14:22,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:22,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:22,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:22,391 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:22,504 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-07-09 17:14:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:22,505 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:14:22,505 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:14:22,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:14:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-07-09 17:14:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 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) [2021-07-09 17:14:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-07-09 17:14:22,508 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-07-09 17:14:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:22,508 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-07-09 17:14:22,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-07-09 17:14:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:22,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:22,518 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:22,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:14:22,734 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-07-09 17:14:22,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:22,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591450854] [2021-07-09 17:14:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:22,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591450854] [2021-07-09 17:14:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591450854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656396493] [2021-07-09 17:14:22,776 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 [2021-07-09 17:14:22,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:14:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:22,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:22,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656396493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:22,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:22,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:22,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520935964] [2021-07-09 17:14:22,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:22,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:22,915 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:22,981 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-07-09 17:14:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:22,982 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:14:22,982 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:14:22,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:14:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-07-09 17:14:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 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) [2021-07-09 17:14:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-07-09 17:14:22,990 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-07-09 17:14:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:22,990 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-07-09 17:14:22,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-07-09 17:14:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:22,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:22,991 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:23,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:14:23,207 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:23,207 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-07-09 17:14:23,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:23,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732939173] [2021-07-09 17:14:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:23,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732939173] [2021-07-09 17:14:23,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732939173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131616800] [2021-07-09 17:14:23,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:23,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131616800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:23,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:23,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887087634] [2021-07-09 17:14:23,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:23,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:23,308 INFO L87 Difference]: Start difference. First operand 111 states and 301 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) [2021-07-09 17:14:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:23,345 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-07-09 17:14:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:14:23,345 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 [2021-07-09 17:14:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:23,347 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:14:23,347 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:14:23,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:14:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-07-09 17:14:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-07-09 17:14:23,350 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-07-09 17:14:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:23,350 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-07-09 17:14:23,350 INFO L483 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) [2021-07-09 17:14:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-07-09 17:14:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:23,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:23,351 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:23,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 17:14:23,567 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-07-09 17:14:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:23,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999241006] [2021-07-09 17:14:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:23,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999241006] [2021-07-09 17:14:23,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999241006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814611949] [2021-07-09 17:14:23,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:23,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:23,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814611949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:23,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:23,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092500625] [2021-07-09 17:14:23,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:23,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:23,662 INFO L87 Difference]: Start difference. First operand 116 states and 317 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) [2021-07-09 17:14:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:23,760 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-07-09 17:14:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:23,760 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 [2021-07-09 17:14:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:23,761 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:14:23,761 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:14:23,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:14:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-07-09 17:14:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-07-09 17:14:23,764 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-07-09 17:14:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:23,764 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-07-09 17:14:23,764 INFO L483 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) [2021-07-09 17:14:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-07-09 17:14:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:23,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:23,765 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:23,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:23,969 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-07-09 17:14:23,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:23,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238782699] [2021-07-09 17:14:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:24,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238782699] [2021-07-09 17:14:24,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238782699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986368086] [2021-07-09 17:14:24,009 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 [2021-07-09 17:14:24,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:14:24,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986368086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500808989] [2021-07-09 17:14:24,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:24,074 INFO L87 Difference]: Start difference. First operand 124 states and 345 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) [2021-07-09 17:14:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:24,138 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-07-09 17:14:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:24,138 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 [2021-07-09 17:14:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:24,139 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:14:24,139 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:14:24,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:14:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-07-09 17:14:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-07-09 17:14:24,142 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-07-09 17:14:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:24,143 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-07-09 17:14:24,143 INFO L483 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) [2021-07-09 17:14:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-07-09 17:14:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:24,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:24,143 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:24,357 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-07-09 17:14:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893136550] [2021-07-09 17:14:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893136550] [2021-07-09 17:14:24,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893136550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89572920] [2021-07-09 17:14:24,389 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) [2021-07-09 17:14:24,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:24,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:24,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89572920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:24,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:24,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646916953] [2021-07-09 17:14:24,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:24,441 INFO L87 Difference]: Start difference. First operand 124 states and 344 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) [2021-07-09 17:14:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:24,477 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-07-09 17:14:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:24,477 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 [2021-07-09 17:14:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:24,478 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:14:24,478 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:14:24,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:14:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-07-09 17:14:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-07-09 17:14:24,486 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-07-09 17:14:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:24,487 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-07-09 17:14:24,487 INFO L483 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) [2021-07-09 17:14:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-07-09 17:14:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:24,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:24,487 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:24,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 17:14:24,701 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-07-09 17:14:24,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:24,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454039911] [2021-07-09 17:14:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454039911] [2021-07-09 17:14:24,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454039911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840612998] [2021-07-09 17:14:24,734 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 [2021-07-09 17:14:24,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:14:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840612998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:24,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592429334] [2021-07-09 17:14:24,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:24,797 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:24,882 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-07-09 17:14:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:24,883 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:14:24,883 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:14:24,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:14:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-07-09 17:14:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-07-09 17:14:24,886 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-07-09 17:14:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:24,886 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-07-09 17:14:24,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-07-09 17:14:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:24,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:24,887 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:25,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:25,099 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-07-09 17:14:25,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:25,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002421672] [2021-07-09 17:14:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:25,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:25,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002421672] [2021-07-09 17:14:25,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002421672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:25,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574506765] [2021-07-09 17:14:25,139 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 [2021-07-09 17:14:25,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:14:25,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574506765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036119187] [2021-07-09 17:14:25,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:25,218 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:25,280 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-07-09 17:14:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:25,282 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:14:25,283 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:14:25,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:14:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-07-09 17:14:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-07-09 17:14:25,286 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-07-09 17:14:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:25,286 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-07-09 17:14:25,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-07-09 17:14:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:25,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:25,288 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:25,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 17:14:25,504 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-07-09 17:14:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:25,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799789324] [2021-07-09 17:14:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:25,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:25,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799789324] [2021-07-09 17:14:25,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799789324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:25,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43817157] [2021-07-09 17:14:25,557 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 [2021-07-09 17:14:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:25,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43817157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:25,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:25,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458328331] [2021-07-09 17:14:25,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:25,609 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:25,679 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-07-09 17:14:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:25,680 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:14:25,680 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:14:25,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:14:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-07-09 17:14:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-07-09 17:14:25,684 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-07-09 17:14:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-07-09 17:14:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-07-09 17:14:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:25,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:25,684 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:25,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:25,900 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-07-09 17:14:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:25,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855610508] [2021-07-09 17:14:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:25,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:25,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855610508] [2021-07-09 17:14:25,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855610508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:25,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587350395] [2021-07-09 17:14:25,941 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 [2021-07-09 17:14:25,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587350395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:26,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767959871] [2021-07-09 17:14:26,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:26,003 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:26,079 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-07-09 17:14:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:26,081 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:14:26,081 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:14:26,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:14:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-07-09 17:14:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-07-09 17:14:26,084 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-07-09 17:14:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:26,085 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-07-09 17:14:26,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-07-09 17:14:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:26,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:26,086 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:14:26,302 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-07-09 17:14:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602944685] [2021-07-09 17:14:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:26,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:26,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602944685] [2021-07-09 17:14:26,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602944685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108548507] [2021-07-09 17:14:26,340 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 [2021-07-09 17:14:26,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:14:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:26,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108548507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:26,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:26,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506740741] [2021-07-09 17:14:26,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:26,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:26,403 INFO L87 Difference]: Start difference. First operand 134 states and 376 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) [2021-07-09 17:14:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:26,434 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-07-09 17:14:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:14:26,434 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 [2021-07-09 17:14:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:26,435 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:14:26,435 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:14:26,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:14:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-07-09 17:14:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-07-09 17:14:26,438 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-07-09 17:14:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:26,438 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-07-09 17:14:26,438 INFO L483 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) [2021-07-09 17:14:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-07-09 17:14:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:26,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:26,439 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:26,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:26,653 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-07-09 17:14:26,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:26,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203926274] [2021-07-09 17:14:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:26,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203926274] [2021-07-09 17:14:26,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203926274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443969986] [2021-07-09 17:14:26,692 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 [2021-07-09 17:14:26,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:26,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443969986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:26,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278409662] [2021-07-09 17:14:26,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:26,738 INFO L87 Difference]: Start difference. First operand 139 states and 394 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) [2021-07-09 17:14:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:26,821 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-07-09 17:14:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:26,821 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 [2021-07-09 17:14:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:26,822 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:14:26,822 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:14:26,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:14:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-07-09 17:14:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-07-09 17:14:26,826 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-07-09 17:14:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:26,826 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-07-09 17:14:26,826 INFO L483 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) [2021-07-09 17:14:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-07-09 17:14:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:26,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:26,826 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:27,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:14:27,041 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-07-09 17:14:27,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:27,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663403022] [2021-07-09 17:14:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:27,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663403022] [2021-07-09 17:14:27,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663403022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414978469] [2021-07-09 17:14:27,074 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 [2021-07-09 17:14:27,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:14:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:27,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414978469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:27,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:27,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075918326] [2021-07-09 17:14:27,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:27,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:27,130 INFO L87 Difference]: Start difference. First operand 157 states and 455 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) [2021-07-09 17:14:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:27,199 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-07-09 17:14:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:27,200 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 [2021-07-09 17:14:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:27,201 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:14:27,201 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:14:27,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:14:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-07-09 17:14:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-07-09 17:14:27,206 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-07-09 17:14:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:27,206 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-07-09 17:14:27,206 INFO L483 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) [2021-07-09 17:14:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-07-09 17:14:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:27,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:27,207 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:27,421 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-07-09 17:14:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698001174] [2021-07-09 17:14:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698001174] [2021-07-09 17:14:27,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698001174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979456357] [2021-07-09 17:14:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:14:27,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:14:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979456357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:27,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:27,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870737595] [2021-07-09 17:14:27,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:27,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:27,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:27,517 INFO L87 Difference]: Start difference. First operand 157 states and 453 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) [2021-07-09 17:14:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:27,547 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-07-09 17:14:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:27,547 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 [2021-07-09 17:14:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:27,548 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:14:27,548 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:14:27,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:14:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-07-09 17:14:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-07-09 17:14:27,551 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-07-09 17:14:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:27,551 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-07-09 17:14:27,551 INFO L483 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) [2021-07-09 17:14:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-07-09 17:14:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:27,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:27,552 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:27,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:27,768 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-07-09 17:14:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:27,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529840862] [2021-07-09 17:14:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:27,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529840862] [2021-07-09 17:14:27,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529840862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947002159] [2021-07-09 17:14:27,805 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 [2021-07-09 17:14:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947002159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:27,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892318113] [2021-07-09 17:14:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:27,856 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:27,941 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-07-09 17:14:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:27,942 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:14:27,942 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:14:27,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:14:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-07-09 17:14:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-07-09 17:14:27,945 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-07-09 17:14:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:27,945 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-07-09 17:14:27,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-07-09 17:14:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:27,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:27,946 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:28,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-09 17:14:28,162 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-07-09 17:14:28,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:28,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335048431] [2021-07-09 17:14:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:28,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335048431] [2021-07-09 17:14:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335048431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305567878] [2021-07-09 17:14:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:14:28,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305567878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:28,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971663385] [2021-07-09 17:14:28,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:28,264 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:28,318 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-07-09 17:14:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:28,319 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:14:28,319 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:14:28,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:14:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-07-09 17:14:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-07-09 17:14:28,322 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-07-09 17:14:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:28,322 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-07-09 17:14:28,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-07-09 17:14:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:28,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:28,323 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:28,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:28,537 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-07-09 17:14:28,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:28,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771997877] [2021-07-09 17:14:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:28,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771997877] [2021-07-09 17:14:28,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771997877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589956570] [2021-07-09 17:14:28,570 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 [2021-07-09 17:14:28,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:14:28,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:28,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589956570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:28,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:28,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329502687] [2021-07-09 17:14:28,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:28,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:28,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:28,620 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:28,684 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-07-09 17:14:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:28,685 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:14:28,685 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:14:28,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:14:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-07-09 17:14:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-07-09 17:14:28,688 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-07-09 17:14:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:28,688 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-07-09 17:14:28,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-07-09 17:14:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:28,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:28,689 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:28,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 17:14:28,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-07-09 17:14:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:28,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419588098] [2021-07-09 17:14:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419588098] [2021-07-09 17:14:28,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419588098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620048753] [2021-07-09 17:14:28,929 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 [2021-07-09 17:14:28,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620048753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756967940] [2021-07-09 17:14:28,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:28,983 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:29,047 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-07-09 17:14:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:29,055 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:14:29,055 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:14:29,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:14:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-07-09 17:14:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-07-09 17:14:29,058 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-07-09 17:14:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:29,058 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-07-09 17:14:29,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-07-09 17:14:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:29,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:29,059 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:29,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:29,275 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-07-09 17:14:29,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:29,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988430436] [2021-07-09 17:14:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:29,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988430436] [2021-07-09 17:14:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988430436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126827448] [2021-07-09 17:14:29,309 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:29,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:14:29,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:29,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126827448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:29,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:29,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:29,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270355327] [2021-07-09 17:14:29,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:29,373 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:29,432 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-07-09 17:14:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:29,433 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:14:29,433 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:14:29,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:14:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-07-09 17:14:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-07-09 17:14:29,436 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-07-09 17:14:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:29,437 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-07-09 17:14:29,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-07-09 17:14:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:29,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:29,437 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:29,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:14:29,652 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-07-09 17:14:29,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:29,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261639970] [2021-07-09 17:14:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:29,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261639970] [2021-07-09 17:14:29,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261639970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83889775] [2021-07-09 17:14:29,682 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 [2021-07-09 17:14:29,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:14:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83889775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:29,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:29,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:29,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86143674] [2021-07-09 17:14:29,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:29,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:29,742 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:29,849 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-07-09 17:14:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 [2021-07-09 17:14:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:29,850 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:14:29,851 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:14:29,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:14:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-07-09 17:14:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-07-09 17:14:29,853 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-07-09 17:14:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:29,854 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-07-09 17:14:29,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-07-09 17:14:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-07-09 17:14:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:29,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:29,854 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:30,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 17:14:30,070 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-07-09 17:14:30,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:30,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655893337] [2021-07-09 17:14:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:30,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655893337] [2021-07-09 17:14:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655893337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436304477] [2021-07-09 17:14:30,102 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 [2021-07-09 17:14:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:30,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436304477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:30,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:30,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810954346] [2021-07-09 17:14:30,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:30,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:30,148 INFO L87 Difference]: Start difference. First operand 162 states and 465 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) [2021-07-09 17:14:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:30,187 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-07-09 17:14:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:30,188 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 15 [2021-07-09 17:14:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:30,189 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:14:30,189 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:14:30,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:14:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-07-09 17:14:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-07-09 17:14:30,192 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-07-09 17:14:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:30,192 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-07-09 17:14:30,192 INFO L483 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) [2021-07-09 17:14:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-07-09 17:14:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:30,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:30,193 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:30,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:30,401 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-07-09 17:14:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:30,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492441166] [2021-07-09 17:14:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:30,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:30,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492441166] [2021-07-09 17:14:30,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492441166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704576678] [2021-07-09 17:14:30,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:14:30,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:30,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:30,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704576678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:30,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323619265] [2021-07-09 17:14:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:30,488 INFO L87 Difference]: Start difference. First operand 168 states and 488 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) [2021-07-09 17:14:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:30,570 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-07-09 17:14:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:30,570 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 15 [2021-07-09 17:14:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:30,571 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:14:30,571 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 17:14:30,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 17:14:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-07-09 17:14:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-07-09 17:14:30,575 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-07-09 17:14:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:30,576 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-07-09 17:14:30,576 INFO L483 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) [2021-07-09 17:14:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-07-09 17:14:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:30,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:30,576 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:30,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:14:30,789 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-07-09 17:14:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856294267] [2021-07-09 17:14:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:30,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:30,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856294267] [2021-07-09 17:14:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856294267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553221458] [2021-07-09 17:14:30,821 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 [2021-07-09 17:14:30,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:14:30,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:30,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:30,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553221458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:30,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:30,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411576794] [2021-07-09 17:14:30,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:30,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:30,873 INFO L87 Difference]: Start difference. First operand 195 states and 577 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) [2021-07-09 17:14:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:30,945 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-07-09 17:14:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:30,945 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 15 [2021-07-09 17:14:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:30,946 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:14:30,946 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:14:30,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:14:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-07-09 17:14:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-07-09 17:14:30,950 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-07-09 17:14:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:30,950 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-07-09 17:14:30,950 INFO L483 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) [2021-07-09 17:14:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-07-09 17:14:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:30,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:30,951 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:31,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,165 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-07-09 17:14:31,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:31,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708348862] [2021-07-09 17:14:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:31,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708348862] [2021-07-09 17:14:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708348862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693263710] [2021-07-09 17:14:31,204 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 [2021-07-09 17:14:31,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:31,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693263710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:31,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:14:31,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624676546] [2021-07-09 17:14:31,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:14:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:31,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:14:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:14:31,261 INFO L87 Difference]: Start difference. First operand 195 states and 576 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) [2021-07-09 17:14:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:31,293 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-07-09 17:14:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:14:31,293 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 15 [2021-07-09 17:14:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:31,294 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:14:31,294 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:14:31,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:14:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-07-09 17:14:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-07-09 17:14:31,298 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-07-09 17:14:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:31,298 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-07-09 17:14:31,298 INFO L483 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) [2021-07-09 17:14:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-07-09 17:14:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:31,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:31,299 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:31,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,514 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-07-09 17:14:31,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:31,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150619075] [2021-07-09 17:14:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:31,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:31,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150619075] [2021-07-09 17:14:31,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150619075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559334879] [2021-07-09 17:14:31,546 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 [2021-07-09 17:14:31,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:14:31,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559334879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:31,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514859072] [2021-07-09 17:14:31,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:31,603 INFO L87 Difference]: Start difference. First operand 194 states and 570 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) [2021-07-09 17:14:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:31,675 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-07-09 17:14:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:31,676 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 15 [2021-07-09 17:14:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:31,676 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:14:31,677 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:14:31,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:14:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-07-09 17:14:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-07-09 17:14:31,689 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-07-09 17:14:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:31,689 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-07-09 17:14:31,689 INFO L483 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) [2021-07-09 17:14:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-07-09 17:14:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:31,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:31,690 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:31,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,901 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-07-09 17:14:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611115313] [2021-07-09 17:14:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:31,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611115313] [2021-07-09 17:14:31,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611115313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555564463] [2021-07-09 17:14:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:14:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:31,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555564463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:31,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:31,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025584868] [2021-07-09 17:14:31,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:31,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:31,997 INFO L87 Difference]: Start difference. First operand 194 states and 569 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) [2021-07-09 17:14:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:32,052 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-07-09 17:14:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:14:32,053 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 15 [2021-07-09 17:14:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:32,053 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:14:32,054 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:14:32,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:32,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:14:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-07-09 17:14:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-07-09 17:14:32,057 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-07-09 17:14:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:32,057 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-07-09 17:14:32,057 INFO L483 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) [2021-07-09 17:14:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-07-09 17:14:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:32,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:32,057 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:32,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:32,269 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-07-09 17:14:32,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:32,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768585231] [2021-07-09 17:14:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:32,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:32,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768585231] [2021-07-09 17:14:32,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768585231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685871627] [2021-07-09 17:14:32,295 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 [2021-07-09 17:14:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:32,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:32,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685871627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:32,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644211489] [2021-07-09 17:14:32,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:32,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:32,358 INFO L87 Difference]: Start difference. First operand 192 states and 562 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) [2021-07-09 17:14:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:32,425 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-07-09 17:14:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:32,426 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 15 [2021-07-09 17:14:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:32,427 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:14:32,427 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:14:32,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:14:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-07-09 17:14:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-07-09 17:14:32,430 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-07-09 17:14:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:32,430 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-07-09 17:14:32,430 INFO L483 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) [2021-07-09 17:14:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-07-09 17:14:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:32,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:32,431 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:32,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 17:14:32,645 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-07-09 17:14:32,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:32,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902921551] [2021-07-09 17:14:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:32,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:32,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902921551] [2021-07-09 17:14:32,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902921551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940362750] [2021-07-09 17:14:32,675 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 [2021-07-09 17:14:32,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:32,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:32,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:32,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940362750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:32,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544332896] [2021-07-09 17:14:32,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:32,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:32,730 INFO L87 Difference]: Start difference. First operand 192 states and 561 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) [2021-07-09 17:14:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:32,788 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-07-09 17:14:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:14:32,789 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 15 [2021-07-09 17:14:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:32,789 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:14:32,789 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:14:32,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:14:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-07-09 17:14:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-07-09 17:14:32,793 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-07-09 17:14:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:32,793 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-07-09 17:14:32,793 INFO L483 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) [2021-07-09 17:14:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-07-09 17:14:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:32,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:32,794 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:33,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:33,009 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-07-09 17:14:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:33,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080633952] [2021-07-09 17:14:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080633952] [2021-07-09 17:14:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080633952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901113787] [2021-07-09 17:14:33,047 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 [2021-07-09 17:14:33,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:14:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:33,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:33,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901113787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:33,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874469008] [2021-07-09 17:14:33,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:33,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:33,114 INFO L87 Difference]: Start difference. First operand 189 states and 551 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) [2021-07-09 17:14:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:33,191 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-07-09 17:14:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:33,192 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 15 [2021-07-09 17:14:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:33,193 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:14:33,193 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:14:33,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:14:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-07-09 17:14:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-07-09 17:14:33,196 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-07-09 17:14:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:33,196 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-07-09 17:14:33,196 INFO L483 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) [2021-07-09 17:14:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-07-09 17:14:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:33,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:33,197 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:33,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 17:14:33,413 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-07-09 17:14:33,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:33,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428944720] [2021-07-09 17:14:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:33,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428944720] [2021-07-09 17:14:33,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428944720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697490883] [2021-07-09 17:14:33,445 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 [2021-07-09 17:14:33,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697490883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:33,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479324361] [2021-07-09 17:14:33,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:33,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:33,496 INFO L87 Difference]: Start difference. First operand 189 states and 550 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) [2021-07-09 17:14:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:33,571 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-07-09 17:14:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:33,571 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 15 [2021-07-09 17:14:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:33,572 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:14:33,572 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:14:33,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:14:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-07-09 17:14:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-07-09 17:14:33,578 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-07-09 17:14:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:33,578 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-07-09 17:14:33,578 INFO L483 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) [2021-07-09 17:14:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-07-09 17:14:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:33,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:33,578 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:33,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:33,793 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-07-09 17:14:33,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:33,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774322457] [2021-07-09 17:14:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774322457] [2021-07-09 17:14:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774322457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820132330] [2021-07-09 17:14:33,829 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 [2021-07-09 17:14:33,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:14:33,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820132330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:33,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109027969] [2021-07-09 17:14:33,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:33,877 INFO L87 Difference]: Start difference. First operand 189 states and 550 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) [2021-07-09 17:14:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:33,938 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-07-09 17:14:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:33,938 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 15 [2021-07-09 17:14:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:33,939 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:14:33,939 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:14:33,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:14:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-07-09 17:14:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-07-09 17:14:33,942 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-07-09 17:14:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:33,942 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-07-09 17:14:33,942 INFO L483 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) [2021-07-09 17:14:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-07-09 17:14:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:14:33,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:33,943 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 17:14:34,157 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-07-09 17:14:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822773052] [2021-07-09 17:14:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:34,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:34,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822773052] [2021-07-09 17:14:34,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822773052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467888572] [2021-07-09 17:14:34,191 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:34,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:14:34,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:34,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:14:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467888572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:34,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:14:34,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46868367] [2021-07-09 17:14:34,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:34,253 INFO L87 Difference]: Start difference. First operand 188 states and 548 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) [2021-07-09 17:14:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:34,375 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-07-09 17:14:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:34,375 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 15 [2021-07-09 17:14:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:34,376 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:14:34,376 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:14:34,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:14:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-07-09 17:14:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-07-09 17:14:34,380 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-07-09 17:14:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:34,380 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-07-09 17:14:34,380 INFO L483 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) [2021-07-09 17:14:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-07-09 17:14:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:14:34,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:34,380 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:34,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:14:34,581 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-07-09 17:14:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792167017] [2021-07-09 17:14:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:34,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792167017] [2021-07-09 17:14:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792167017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963552438] [2021-07-09 17:14:34,646 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 [2021-07-09 17:14:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:14:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:34,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963552438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:34,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:14:34,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477192406] [2021-07-09 17:14:34,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:34,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:34,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:34,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:34,734 INFO L87 Difference]: Start difference. First operand 196 states and 570 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:34,787 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-07-09 17:14:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:14:34,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:14:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:34,788 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:14:34,788 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:14:34,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:14:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-07-09 17:14:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-07-09 17:14:34,792 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-07-09 17:14:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:34,792 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-07-09 17:14:34,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-07-09 17:14:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:14:34,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:34,793 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:35,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:14:35,009 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-07-09 17:14:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:35,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711323999] [2021-07-09 17:14:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:35,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:35,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711323999] [2021-07-09 17:14:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711323999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285064928] [2021-07-09 17:14:35,084 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 [2021-07-09 17:14:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:14:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:35,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285064928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:35,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:14:35,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662941544] [2021-07-09 17:14:35,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:35,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:35,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:35,169 INFO L87 Difference]: Start difference. First operand 234 states and 666 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:35,237 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-07-09 17:14:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:14:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:14:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:35,239 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:14:35,239 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:14:35,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:14:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-07-09 17:14:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-07-09 17:14:35,244 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-07-09 17:14:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:35,244 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-07-09 17:14:35,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-07-09 17:14:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:14:35,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:35,245 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:35,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:14:35,465 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-07-09 17:14:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:35,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390574241] [2021-07-09 17:14:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:35,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390574241] [2021-07-09 17:14:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390574241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115616499] [2021-07-09 17:14:35,545 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 [2021-07-09 17:14:35,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:14:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:35,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:35,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115616499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:35,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:14:35,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199958290] [2021-07-09 17:14:35,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:35,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:35,659 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:14:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:35,760 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-07-09 17:14:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:14:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 [2021-07-09 17:14:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:35,762 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:14:35,762 INFO L226 Difference]: Without dead ends: 507 [2021-07-09 17:14:35,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:14:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-09 17:14:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-07-09 17:14:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-07-09 17:14:35,767 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-07-09 17:14:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:35,767 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-07-09 17:14:35,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:14:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-07-09 17:14:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:35,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:35,768 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:35,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:14:35,978 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-07-09 17:14:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108273625] [2021-07-09 17:14:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:36,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108273625] [2021-07-09 17:14:36,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108273625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354843033] [2021-07-09 17:14:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:36,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:36,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:36,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:37,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:37,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:37,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:37,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:37,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354843033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:37,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:37,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:37,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486122236] [2021-07-09 17:14:37,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:37,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:37,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:37,538 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-07-09 17:14:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:37,699 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-07-09 17:14:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 19 [2021-07-09 17:14:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:37,701 INFO L225 Difference]: With dead ends: 489 [2021-07-09 17:14:37,701 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 17:14:37,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 17:14:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-07-09 17:14:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-07-09 17:14:37,706 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-07-09 17:14:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:37,706 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-07-09 17:14:37,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-07-09 17:14:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-07-09 17:14:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:37,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:37,707 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:37,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:14:37,921 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-07-09 17:14:37,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:37,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828789044] [2021-07-09 17:14:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:37,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828789044] [2021-07-09 17:14:37,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828789044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081219787] [2021-07-09 17:14:37,973 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 [2021-07-09 17:14:37,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:14:37,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:38,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:39,514 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 236 [2021-07-09 17:14:40,278 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-07-09 17:14:40,470 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-07-09 17:14:40,720 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 315 [2021-07-09 17:14:40,895 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 349 [2021-07-09 17:14:41,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:41,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:41,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:41,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:41,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081219787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:41,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:41,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:41,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818824000] [2021-07-09 17:14:41,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:41,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:41,486 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:41,615 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-07-09 17:14:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:41,617 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:14:41,617 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:14:41,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:14:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-07-09 17:14:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-07-09 17:14:41,624 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-07-09 17:14:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:41,624 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-07-09 17:14:41,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-07-09 17:14:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:41,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:41,625 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:41,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:41,841 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-07-09 17:14:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:41,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736585293] [2021-07-09 17:14:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:41,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736585293] [2021-07-09 17:14:41,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736585293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275117150] [2021-07-09 17:14:41,888 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 [2021-07-09 17:14:41,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:14:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:42,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:42,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:43,007 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-07-09 17:14:43,137 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-07-09 17:14:43,291 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 374 [2021-07-09 17:14:44,646 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 320 [2021-07-09 17:14:44,893 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-07-09 17:14:45,112 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-07-09 17:14:45,357 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 379 [2021-07-09 17:14:45,616 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 432 [2021-07-09 17:14:46,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:46,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:46,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:46,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:46,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275117150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:46,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:46,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143953311] [2021-07-09 17:14:46,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:46,455 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:46,609 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-07-09 17:14:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:46,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:46,612 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:14:46,612 INFO L226 Difference]: Without dead ends: 624 [2021-07-09 17:14:46,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-09 17:14:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-07-09 17:14:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-07-09 17:14:46,619 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-07-09 17:14:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:46,619 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-07-09 17:14:46,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-07-09 17:14:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:46,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:46,620 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:46,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:46,836 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-07-09 17:14:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:46,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17712350] [2021-07-09 17:14:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:46,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:46,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17712350] [2021-07-09 17:14:46,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17712350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:46,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123485290] [2021-07-09 17:14:46,887 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 [2021-07-09 17:14:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:47,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:48,414 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 270 [2021-07-09 17:14:49,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:49,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:49,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:49,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123485290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:49,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:49,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479727020] [2021-07-09 17:14:49,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:49,036 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:49,207 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-07-09 17:14:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:49,210 INFO L225 Difference]: With dead ends: 708 [2021-07-09 17:14:49,210 INFO L226 Difference]: Without dead ends: 705 [2021-07-09 17:14:49,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-07-09 17:14:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-07-09 17:14:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-07-09 17:14:49,220 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-07-09 17:14:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:49,220 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-07-09 17:14:49,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-07-09 17:14:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:49,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:49,221 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:49,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-07-09 17:14:49,437 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-07-09 17:14:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:49,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852127002] [2021-07-09 17:14:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:49,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:49,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852127002] [2021-07-09 17:14:49,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852127002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:49,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076520933] [2021-07-09 17:14:49,490 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 [2021-07-09 17:14:49,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:49,770 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:14:49,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:49,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:50,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:50,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:50,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:50,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:50,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076520933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:50,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:50,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:50,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798528749] [2021-07-09 17:14:50,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:50,897 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:51,084 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-07-09 17:14:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:51,087 INFO L225 Difference]: With dead ends: 810 [2021-07-09 17:14:51,087 INFO L226 Difference]: Without dead ends: 807 [2021-07-09 17:14:51,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-07-09 17:14:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-07-09 17:14:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-07-09 17:14:51,097 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-07-09 17:14:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:51,097 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-07-09 17:14:51,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-07-09 17:14:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:51,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:51,099 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:51,309 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-07-09 17:14:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:51,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995286461] [2021-07-09 17:14:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:51,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995286461] [2021-07-09 17:14:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995286461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841586945] [2021-07-09 17:14:51,357 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 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 [2021-07-09 17:14:51,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:14:51,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:51,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:52,192 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-07-09 17:14:52,295 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-07-09 17:14:52,413 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 298 [2021-07-09 17:14:53,221 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 255 [2021-07-09 17:14:53,425 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 263 [2021-07-09 17:14:53,603 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 210 [2021-07-09 17:14:54,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:54,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:54,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:54,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841586945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:54,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:54,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437140799] [2021-07-09 17:14:54,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:54,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:54,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:54,122 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:54,323 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-07-09 17:14:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:54,327 INFO L225 Difference]: With dead ends: 900 [2021-07-09 17:14:54,327 INFO L226 Difference]: Without dead ends: 897 [2021-07-09 17:14:54,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-09 17:14:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-07-09 17:14:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-07-09 17:14:54,337 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-07-09 17:14:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:54,337 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-07-09 17:14:54,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-07-09 17:14:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:54,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:54,339 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:54,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1509 [2021-07-09 17:14:54,544 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-07-09 17:14:54,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:54,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142215426] [2021-07-09 17:14:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:54,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:54,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142215426] [2021-07-09 17:14:54,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142215426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:54,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896295203] [2021-07-09 17:14:54,594 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 [2021-07-09 17:14:54,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:54,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:54,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:54,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:56,102 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-07-09 17:14:56,336 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-07-09 17:14:56,571 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-07-09 17:14:56,827 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 460 [2021-07-09 17:14:57,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:57,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:57,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:57,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:57,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896295203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:57,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:57,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:57,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056457643] [2021-07-09 17:14:57,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:57,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:57,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:57,388 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:57,611 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-07-09 17:14:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:57,615 INFO L225 Difference]: With dead ends: 993 [2021-07-09 17:14:57,615 INFO L226 Difference]: Without dead ends: 990 [2021-07-09 17:14:57,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-07-09 17:14:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-07-09 17:14:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-07-09 17:14:57,627 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-07-09 17:14:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:57,627 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-07-09 17:14:57,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-07-09 17:14:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:57,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:57,628 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:57,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1805,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:57,845 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-07-09 17:14:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661384611] [2021-07-09 17:14:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:57,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661384611] [2021-07-09 17:14:57,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661384611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256495034] [2021-07-09 17:14:57,897 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 [2021-07-09 17:14:57,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:14:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:14:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:58,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:58,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:14:59,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:59,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:59,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:59,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:14:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:59,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256495034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:59,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:59,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:14:59,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233123293] [2021-07-09 17:14:59,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:14:59,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:14:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:59,619 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:59,852 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-07-09 17:14:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:14:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:59,856 INFO L225 Difference]: With dead ends: 1089 [2021-07-09 17:14:59,856 INFO L226 Difference]: Without dead ends: 1086 [2021-07-09 17:14:59,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-09 17:14:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-07-09 17:14:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-07-09 17:14:59,870 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-07-09 17:14:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:59,870 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-07-09 17:14:59,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-07-09 17:14:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:14:59,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:59,871 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:00,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-07-09 17:15:00,072 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-07-09 17:15:00,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:00,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404350152] [2021-07-09 17:15:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:00,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:00,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404350152] [2021-07-09 17:15:00,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404350152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:00,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525380587] [2021-07-09 17:15:00,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:00,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:00,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:15:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:00,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:15:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:15:00,921 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 348 [2021-07-09 17:15:01,436 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-07-09 17:15:01,659 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-07-09 17:15:01,927 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 518 [2021-07-09 17:15:02,820 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 701 [2021-07-09 17:15:03,542 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 513 [2021-07-09 17:15:04,103 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 264 [2021-07-09 17:15:05,018 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 280 [2021-07-09 17:15:05,175 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 335 [2021-07-09 17:15:05,473 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-07-09 17:15:05,748 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-07-09 17:15:06,051 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 998 DAG size of output: 352 [2021-07-09 17:15:06,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:15:06,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:15:06,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:15:06,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:15:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:06,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525380587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:06,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:15:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274358739] [2021-07-09 17:15:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:15:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:15:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:15:06,542 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:06,770 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-07-09 17:15:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:15:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:15:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:06,774 INFO L225 Difference]: With dead ends: 1152 [2021-07-09 17:15:06,774 INFO L226 Difference]: Without dead ends: 1149 [2021-07-09 17:15:06,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:15:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-07-09 17:15:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-07-09 17:15:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-07-09 17:15:06,790 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-07-09 17:15:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:06,790 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-07-09 17:15:06,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-07-09 17:15:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:06,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:06,792 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:06,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:06,993 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:06,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-07-09 17:15:06,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:06,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544465843] [2021-07-09 17:15:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:07,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:07,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544465843] [2021-07-09 17:15:07,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544465843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323958497] [2021-07-09 17:15:07,072 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 [2021-07-09 17:15:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323958497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:07,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:07,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111092000] [2021-07-09 17:15:07,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:07,141 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 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) [2021-07-09 17:15:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:07,297 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-07-09 17:15:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:07,297 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 [2021-07-09 17:15:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:07,300 INFO L225 Difference]: With dead ends: 1163 [2021-07-09 17:15:07,300 INFO L226 Difference]: Without dead ends: 1163 [2021-07-09 17:15:07,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:15:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-09 17:15:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-07-09 17:15:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-07-09 17:15:07,314 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-07-09 17:15:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-07-09 17:15:07,315 INFO L483 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) [2021-07-09 17:15:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-07-09 17:15:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:07,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:07,316 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:07,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3016,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:07,517 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-07-09 17:15:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568276903] [2021-07-09 17:15:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:07,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:07,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568276903] [2021-07-09 17:15:07,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568276903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:07,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274188207] [2021-07-09 17:15:07,583 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 [2021-07-09 17:15:07,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274188207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:07,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031554957] [2021-07-09 17:15:07,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:07,648 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 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) [2021-07-09 17:15:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:07,867 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-07-09 17:15:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:15:07,868 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 [2021-07-09 17:15:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:07,871 INFO L225 Difference]: With dead ends: 1245 [2021-07-09 17:15:07,871 INFO L226 Difference]: Without dead ends: 1238 [2021-07-09 17:15:07,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:15:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-07-09 17:15:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-07-09 17:15:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-07-09 17:15:07,886 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-07-09 17:15:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:07,886 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-07-09 17:15:07,886 INFO L483 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) [2021-07-09 17:15:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-07-09 17:15:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:07,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:07,887 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:08,088 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-07-09 17:15:08,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:08,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855099485] [2021-07-09 17:15:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:08,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:08,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855099485] [2021-07-09 17:15:08,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855099485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001158205] [2021-07-09 17:15:08,146 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 [2021-07-09 17:15:08,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:08,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001158205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:08,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:08,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199165379] [2021-07-09 17:15:08,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:08,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:08,215 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 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) [2021-07-09 17:15:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:08,332 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-07-09 17:15:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:08,332 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 [2021-07-09 17:15:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:08,335 INFO L225 Difference]: With dead ends: 1068 [2021-07-09 17:15:08,335 INFO L226 Difference]: Without dead ends: 1067 [2021-07-09 17:15:08,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-09 17:15:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-07-09 17:15:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-07-09 17:15:08,349 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-07-09 17:15:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:08,350 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-07-09 17:15:08,350 INFO L483 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) [2021-07-09 17:15:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-07-09 17:15:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:08,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:08,351 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:08,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3018,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:08,552 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-07-09 17:15:08,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:08,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277730668] [2021-07-09 17:15:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:08,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277730668] [2021-07-09 17:15:08,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277730668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485077971] [2021-07-09 17:15:08,621 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) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:08,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:08,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485077971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:08,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:08,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441690581] [2021-07-09 17:15:08,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:08,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:08,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:08,691 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 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) [2021-07-09 17:15:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:08,757 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-07-09 17:15:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:08,757 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 [2021-07-09 17:15:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:08,759 INFO L225 Difference]: With dead ends: 1274 [2021-07-09 17:15:08,759 INFO L226 Difference]: Without dead ends: 1274 [2021-07-09 17:15:08,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-09 17:15:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-07-09 17:15:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-07-09 17:15:08,774 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-07-09 17:15:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:08,774 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-07-09 17:15:08,774 INFO L483 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) [2021-07-09 17:15:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-07-09 17:15:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:08,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:08,776 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:08,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3019 [2021-07-09 17:15:08,989 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-07-09 17:15:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:08,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225942212] [2021-07-09 17:15:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:09,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:09,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225942212] [2021-07-09 17:15:09,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225942212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742968788] [2021-07-09 17:15:09,062 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 [2021-07-09 17:15:09,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:09,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742968788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:09,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:09,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479585495] [2021-07-09 17:15:09,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:09,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:09,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:09,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:09,154 INFO L87 Difference]: Start difference. First operand 995 states and 3238 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) [2021-07-09 17:15:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:09,255 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-07-09 17:15:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:09,255 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 [2021-07-09 17:15:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:09,257 INFO L225 Difference]: With dead ends: 1213 [2021-07-09 17:15:09,257 INFO L226 Difference]: Without dead ends: 1213 [2021-07-09 17:15:09,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-07-09 17:15:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-07-09 17:15:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-07-09 17:15:09,272 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-07-09 17:15:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:09,272 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-07-09 17:15:09,272 INFO L483 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) [2021-07-09 17:15:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-07-09 17:15:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:09,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:09,274 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:09,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-07-09 17:15:09,475 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-07-09 17:15:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:09,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959293029] [2021-07-09 17:15:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959293029] [2021-07-09 17:15:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959293029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646897167] [2021-07-09 17:15:09,531 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 [2021-07-09 17:15:09,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646897167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:09,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268505384] [2021-07-09 17:15:09,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:09,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:09,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:09,589 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 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) [2021-07-09 17:15:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:09,750 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-07-09 17:15:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:09,751 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 [2021-07-09 17:15:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:09,753 INFO L225 Difference]: With dead ends: 1229 [2021-07-09 17:15:09,754 INFO L226 Difference]: Without dead ends: 1227 [2021-07-09 17:15:09,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-09 17:15:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-07-09 17:15:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-07-09 17:15:09,773 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-07-09 17:15:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:09,773 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-07-09 17:15:09,773 INFO L483 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) [2021-07-09 17:15:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-07-09 17:15:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:09,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:09,775 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:09,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3021,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:09,993 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-07-09 17:15:09,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:09,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996528013] [2021-07-09 17:15:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:10,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:10,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996528013] [2021-07-09 17:15:10,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996528013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:10,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139692873] [2021-07-09 17:15:10,047 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 [2021-07-09 17:15:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139692873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:10,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:10,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132420127] [2021-07-09 17:15:10,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:10,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:10,120 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 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) [2021-07-09 17:15:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:10,265 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-07-09 17:15:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:10,265 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 [2021-07-09 17:15:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:10,268 INFO L225 Difference]: With dead ends: 1156 [2021-07-09 17:15:10,268 INFO L226 Difference]: Without dead ends: 1154 [2021-07-09 17:15:10,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-07-09 17:15:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-07-09 17:15:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-07-09 17:15:10,282 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-07-09 17:15:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:10,282 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-07-09 17:15:10,282 INFO L483 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) [2021-07-09 17:15:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-07-09 17:15:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:10,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:10,284 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:10,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-07-09 17:15:10,501 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-07-09 17:15:10,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:10,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053309867] [2021-07-09 17:15:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:10,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:10,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053309867] [2021-07-09 17:15:10,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053309867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:10,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102211782] [2021-07-09 17:15:10,555 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 [2021-07-09 17:15:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:10,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102211782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:10,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:10,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942967333] [2021-07-09 17:15:10,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:10,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:10,615 INFO L87 Difference]: Start difference. First operand 998 states and 3227 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) [2021-07-09 17:15:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:10,667 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-07-09 17:15:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:10,668 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 [2021-07-09 17:15:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:10,670 INFO L225 Difference]: With dead ends: 1269 [2021-07-09 17:15:10,670 INFO L226 Difference]: Without dead ends: 1269 [2021-07-09 17:15:10,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-09 17:15:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-07-09 17:15:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-07-09 17:15:10,685 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-07-09 17:15:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:10,685 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-07-09 17:15:10,685 INFO L483 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) [2021-07-09 17:15:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-07-09 17:15:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:10,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:10,687 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:10,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-07-09 17:15:10,893 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-07-09 17:15:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:10,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754645151] [2021-07-09 17:15:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:10,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:10,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754645151] [2021-07-09 17:15:10,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754645151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:10,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959053815] [2021-07-09 17:15:10,950 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 [2021-07-09 17:15:10,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:10,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:11,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959053815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:11,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:11,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:11,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127593348] [2021-07-09 17:15:11,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:11,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:11,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:11,014 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 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) [2021-07-09 17:15:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:11,171 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-07-09 17:15:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:11,171 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 [2021-07-09 17:15:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:11,173 INFO L225 Difference]: With dead ends: 1102 [2021-07-09 17:15:11,173 INFO L226 Difference]: Without dead ends: 1100 [2021-07-09 17:15:11,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-07-09 17:15:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-07-09 17:15:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-07-09 17:15:11,186 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-07-09 17:15:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:11,186 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-07-09 17:15:11,186 INFO L483 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) [2021-07-09 17:15:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-07-09 17:15:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:11,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:11,188 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:11,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:11,388 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-07-09 17:15:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:11,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174220382] [2021-07-09 17:15:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:11,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174220382] [2021-07-09 17:15:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174220382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994584323] [2021-07-09 17:15:11,444 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 [2021-07-09 17:15:11,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:11,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994584323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:11,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:11,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785947302] [2021-07-09 17:15:11,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:11,510 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 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) [2021-07-09 17:15:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:11,584 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-07-09 17:15:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:11,585 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 [2021-07-09 17:15:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:11,587 INFO L225 Difference]: With dead ends: 1353 [2021-07-09 17:15:11,587 INFO L226 Difference]: Without dead ends: 1353 [2021-07-09 17:15:11,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-07-09 17:15:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-07-09 17:15:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-07-09 17:15:11,602 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-07-09 17:15:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:11,602 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-07-09 17:15:11,602 INFO L483 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) [2021-07-09 17:15:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-07-09 17:15:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:11,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:11,604 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:11,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:11,817 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-07-09 17:15:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737586524] [2021-07-09 17:15:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:11,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737586524] [2021-07-09 17:15:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737586524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273559783] [2021-07-09 17:15:11,873 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 [2021-07-09 17:15:11,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:11,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:11,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273559783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:11,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:11,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:11,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125508300] [2021-07-09 17:15:11,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:11,936 INFO L87 Difference]: Start difference. First operand 965 states and 3099 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) [2021-07-09 17:15:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:12,037 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-07-09 17:15:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:12,038 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 [2021-07-09 17:15:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:12,040 INFO L225 Difference]: With dead ends: 1173 [2021-07-09 17:15:12,040 INFO L226 Difference]: Without dead ends: 1173 [2021-07-09 17:15:12,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-09 17:15:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-07-09 17:15:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-07-09 17:15:12,054 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-07-09 17:15:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:12,054 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-07-09 17:15:12,054 INFO L483 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) [2021-07-09 17:15:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-07-09 17:15:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:12,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:12,056 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:12,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:12,256 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-07-09 17:15:12,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:12,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455543612] [2021-07-09 17:15:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:12,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455543612] [2021-07-09 17:15:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455543612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558458312] [2021-07-09 17:15:12,320 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 [2021-07-09 17:15:12,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:12,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:12,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558458312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894462131] [2021-07-09 17:15:12,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:12,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:12,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:12,392 INFO L87 Difference]: Start difference. First operand 959 states and 3058 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) [2021-07-09 17:15:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:12,541 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-07-09 17:15:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:12,543 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 [2021-07-09 17:15:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:12,545 INFO L225 Difference]: With dead ends: 1173 [2021-07-09 17:15:12,545 INFO L226 Difference]: Without dead ends: 1171 [2021-07-09 17:15:12,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-07-09 17:15:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-07-09 17:15:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-07-09 17:15:12,569 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-07-09 17:15:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:12,569 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-07-09 17:15:12,569 INFO L483 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) [2021-07-09 17:15:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-07-09 17:15:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:12,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:12,571 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:12,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:12,781 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-07-09 17:15:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:12,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820423915] [2021-07-09 17:15:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:12,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:12,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820423915] [2021-07-09 17:15:12,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820423915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:12,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868043853] [2021-07-09 17:15:12,836 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:12,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868043853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:12,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:12,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953669827] [2021-07-09 17:15:12,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:12,892 INFO L87 Difference]: Start difference. First operand 971 states and 3098 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) [2021-07-09 17:15:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:13,020 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-07-09 17:15:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:13,020 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 [2021-07-09 17:15:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:13,022 INFO L225 Difference]: With dead ends: 1115 [2021-07-09 17:15:13,022 INFO L226 Difference]: Without dead ends: 1113 [2021-07-09 17:15:13,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-09 17:15:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-07-09 17:15:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-07-09 17:15:13,035 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-07-09 17:15:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:13,035 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-07-09 17:15:13,035 INFO L483 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) [2021-07-09 17:15:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-07-09 17:15:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:13,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:13,037 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:13,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:13,237 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-07-09 17:15:13,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:13,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208813476] [2021-07-09 17:15:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:13,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208813476] [2021-07-09 17:15:13,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208813476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:13,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262816871] [2021-07-09 17:15:13,292 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 [2021-07-09 17:15:13,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:13,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262816871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:13,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:13,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:13,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116946312] [2021-07-09 17:15:13,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:13,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:13,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:13,353 INFO L87 Difference]: Start difference. First operand 965 states and 3075 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) [2021-07-09 17:15:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:13,415 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-07-09 17:15:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:13,415 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 [2021-07-09 17:15:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:13,417 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 17:15:13,417 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:15:13,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:15:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-07-09 17:15:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-07-09 17:15:13,451 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-07-09 17:15:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:13,451 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-07-09 17:15:13,451 INFO L483 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) [2021-07-09 17:15:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-07-09 17:15:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:13,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:13,453 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:13,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:13,654 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-07-09 17:15:13,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:13,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286089227] [2021-07-09 17:15:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:13,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286089227] [2021-07-09 17:15:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286089227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258222800] [2021-07-09 17:15:13,715 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 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 [2021-07-09 17:15:13,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:13,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:13,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:13,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258222800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:13,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:13,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:13,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179725265] [2021-07-09 17:15:13,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:13,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:13,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:13,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:13,774 INFO L87 Difference]: Start difference. First operand 967 states and 3081 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) [2021-07-09 17:15:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:13,911 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-07-09 17:15:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:13,911 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 [2021-07-09 17:15:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:13,913 INFO L225 Difference]: With dead ends: 1112 [2021-07-09 17:15:13,913 INFO L226 Difference]: Without dead ends: 1110 [2021-07-09 17:15:13,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-09 17:15:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-07-09 17:15:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-07-09 17:15:13,926 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-07-09 17:15:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:13,926 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-07-09 17:15:13,926 INFO L483 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) [2021-07-09 17:15:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-07-09 17:15:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:13,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:13,928 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-07-09 17:15:14,144 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-07-09 17:15:14,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:14,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492946516] [2021-07-09 17:15:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:14,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492946516] [2021-07-09 17:15:14,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492946516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:14,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645271744] [2021-07-09 17:15:14,200 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 [2021-07-09 17:15:14,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:14,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:14,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645271744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:14,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:14,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:14,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192295320] [2021-07-09 17:15:14,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:14,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:14,274 INFO L87 Difference]: Start difference. First operand 967 states and 3077 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) [2021-07-09 17:15:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:14,339 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-07-09 17:15:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:14,340 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 [2021-07-09 17:15:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:14,341 INFO L225 Difference]: With dead ends: 1326 [2021-07-09 17:15:14,341 INFO L226 Difference]: Without dead ends: 1326 [2021-07-09 17:15:14,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-09 17:15:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-07-09 17:15:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-07-09 17:15:14,356 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-07-09 17:15:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:14,356 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-07-09 17:15:14,356 INFO L483 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) [2021-07-09 17:15:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-07-09 17:15:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:14,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:14,357 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:14,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-07-09 17:15:14,574 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-07-09 17:15:14,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:14,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734338143] [2021-07-09 17:15:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:14,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734338143] [2021-07-09 17:15:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734338143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134342468] [2021-07-09 17:15:14,641 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 [2021-07-09 17:15:14,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:14,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:14,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134342468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:14,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:14,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:14,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310385470] [2021-07-09 17:15:14,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:14,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:14,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:14,708 INFO L87 Difference]: Start difference. First operand 938 states and 2965 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) [2021-07-09 17:15:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:14,877 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-07-09 17:15:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:14,878 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 [2021-07-09 17:15:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:14,879 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 17:15:14,879 INFO L226 Difference]: Without dead ends: 1103 [2021-07-09 17:15:14,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-07-09 17:15:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-07-09 17:15:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-07-09 17:15:14,897 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-07-09 17:15:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:14,897 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-07-09 17:15:14,897 INFO L483 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) [2021-07-09 17:15:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-07-09 17:15:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:14,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:14,898 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:15,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-07-09 17:15:15,113 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-07-09 17:15:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:15,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053127787] [2021-07-09 17:15:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:15,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:15,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053127787] [2021-07-09 17:15:15,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053127787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:15,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320586836] [2021-07-09 17:15:15,180 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 [2021-07-09 17:15:15,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:15,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:15,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320586836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:15,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:15,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:15,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930934506] [2021-07-09 17:15:15,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:15,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:15,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:15,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:15,247 INFO L87 Difference]: Start difference. First operand 941 states and 2974 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) [2021-07-09 17:15:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:15,357 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-07-09 17:15:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:15:15,357 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 [2021-07-09 17:15:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:15,360 INFO L225 Difference]: With dead ends: 1725 [2021-07-09 17:15:15,360 INFO L226 Difference]: Without dead ends: 1725 [2021-07-09 17:15:15,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-07-09 17:15:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-07-09 17:15:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-07-09 17:15:15,379 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-07-09 17:15:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:15,379 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-07-09 17:15:15,379 INFO L483 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) [2021-07-09 17:15:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-07-09 17:15:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:15,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:15,381 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:15,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3033,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:15,597 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-07-09 17:15:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:15,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216646837] [2021-07-09 17:15:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:15,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:15,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216646837] [2021-07-09 17:15:15,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216646837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:15,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115646800] [2021-07-09 17:15:15,685 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 [2021-07-09 17:15:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115646800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583447322] [2021-07-09 17:15:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:15,792 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 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) [2021-07-09 17:15:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:15,902 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-07-09 17:15:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:15,902 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 [2021-07-09 17:15:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:15,905 INFO L225 Difference]: With dead ends: 1481 [2021-07-09 17:15:15,905 INFO L226 Difference]: Without dead ends: 1481 [2021-07-09 17:15:15,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-09 17:15:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-07-09 17:15:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-07-09 17:15:15,924 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-07-09 17:15:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:15,924 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-07-09 17:15:15,925 INFO L483 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) [2021-07-09 17:15:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-07-09 17:15:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:15,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:15,926 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:16,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-07-09 17:15:16,141 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:16,141 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-07-09 17:15:16,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:16,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409758400] [2021-07-09 17:15:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:16,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409758400] [2021-07-09 17:15:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409758400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845260721] [2021-07-09 17:15:16,191 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 [2021-07-09 17:15:16,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:16,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:16,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845260721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:16,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:16,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658723509] [2021-07-09 17:15:16,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:16,243 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 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) [2021-07-09 17:15:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:16,374 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-07-09 17:15:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:16,375 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 [2021-07-09 17:15:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:16,377 INFO L225 Difference]: With dead ends: 1495 [2021-07-09 17:15:16,377 INFO L226 Difference]: Without dead ends: 1493 [2021-07-09 17:15:16,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-07-09 17:15:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-07-09 17:15:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-07-09 17:15:16,396 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-07-09 17:15:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:16,396 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-07-09 17:15:16,396 INFO L483 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) [2021-07-09 17:15:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-07-09 17:15:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:16,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:16,398 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:16,615 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-07-09 17:15:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:16,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890630409] [2021-07-09 17:15:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:16,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890630409] [2021-07-09 17:15:16,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890630409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69880618] [2021-07-09 17:15:16,661 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 [2021-07-09 17:15:16,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:16,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:15:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:16,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69880618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:16,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 17:15:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400281429] [2021-07-09 17:15:16,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:15:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:15:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:16,804 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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) [2021-07-09 17:15:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:17,717 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-07-09 17:15:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 17:15:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:15:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:17,723 INFO L225 Difference]: With dead ends: 2116 [2021-07-09 17:15:17,723 INFO L226 Difference]: Without dead ends: 2110 [2021-07-09 17:15:17,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 17:15:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-07-09 17:15:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-07-09 17:15:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-07-09 17:15:17,752 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-07-09 17:15:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:17,752 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-07-09 17:15:17,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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) [2021-07-09 17:15:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-07-09 17:15:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:17,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:17,755 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:17,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:17,969 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-07-09 17:15:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:17,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924017870] [2021-07-09 17:15:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924017870] [2021-07-09 17:15:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924017870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039247661] [2021-07-09 17:15:18,038 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 [2021-07-09 17:15:18,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:18,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039247661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:18,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:18,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496245949] [2021-07-09 17:15:18,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:18,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:18,097 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 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) [2021-07-09 17:15:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:18,150 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-07-09 17:15:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:18,151 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 [2021-07-09 17:15:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:18,154 INFO L225 Difference]: With dead ends: 1971 [2021-07-09 17:15:18,154 INFO L226 Difference]: Without dead ends: 1971 [2021-07-09 17:15:18,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-07-09 17:15:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-07-09 17:15:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-07-09 17:15:18,180 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-07-09 17:15:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:18,180 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-07-09 17:15:18,180 INFO L483 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) [2021-07-09 17:15:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-07-09 17:15:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:18,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:18,182 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:18,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:18,389 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-07-09 17:15:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956366498] [2021-07-09 17:15:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956366498] [2021-07-09 17:15:18,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956366498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936471478] [2021-07-09 17:15:18,444 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 [2021-07-09 17:15:18,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936471478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:18,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:18,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124892268] [2021-07-09 17:15:18,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:18,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:18,513 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 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) [2021-07-09 17:15:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:18,594 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-07-09 17:15:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:18,594 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 [2021-07-09 17:15:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:18,598 INFO L225 Difference]: With dead ends: 2070 [2021-07-09 17:15:18,598 INFO L226 Difference]: Without dead ends: 2070 [2021-07-09 17:15:18,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-07-09 17:15:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-07-09 17:15:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-07-09 17:15:18,624 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-07-09 17:15:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:18,624 INFO L482 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-07-09 17:15:18,624 INFO L483 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) [2021-07-09 17:15:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-07-09 17:15:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:18,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:18,626 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3038 [2021-07-09 17:15:18,833 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-07-09 17:15:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146202725] [2021-07-09 17:15:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:18,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146202725] [2021-07-09 17:15:18,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146202725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109408458] [2021-07-09 17:15:18,906 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 [2021-07-09 17:15:18,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109408458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:18,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:18,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:18,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555597372] [2021-07-09 17:15:18,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:18,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:18,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:18,984 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 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) [2021-07-09 17:15:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:19,077 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-07-09 17:15:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:19,077 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 [2021-07-09 17:15:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:19,081 INFO L225 Difference]: With dead ends: 2650 [2021-07-09 17:15:19,081 INFO L226 Difference]: Without dead ends: 2650 [2021-07-09 17:15:19,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-07-09 17:15:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-07-09 17:15:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-07-09 17:15:19,113 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-07-09 17:15:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:19,113 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-07-09 17:15:19,113 INFO L483 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) [2021-07-09 17:15:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-07-09 17:15:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:19,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:19,115 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:19,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:19,325 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-07-09 17:15:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:19,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78953738] [2021-07-09 17:15:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:19,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78953738] [2021-07-09 17:15:19,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78953738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271934386] [2021-07-09 17:15:19,417 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 [2021-07-09 17:15:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271934386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:19,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:19,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520073952] [2021-07-09 17:15:19,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:19,479 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 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) [2021-07-09 17:15:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:19,643 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-07-09 17:15:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:19,643 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 [2021-07-09 17:15:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:19,649 INFO L225 Difference]: With dead ends: 3538 [2021-07-09 17:15:19,649 INFO L226 Difference]: Without dead ends: 3538 [2021-07-09 17:15:19,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-07-09 17:15:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-07-09 17:15:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-07-09 17:15:19,692 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-07-09 17:15:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:19,692 INFO L482 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-07-09 17:15:19,692 INFO L483 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) [2021-07-09 17:15:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-07-09 17:15:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:19,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:19,696 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:19,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-07-09 17:15:19,897 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-07-09 17:15:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:19,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048889692] [2021-07-09 17:15:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:19,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048889692] [2021-07-09 17:15:19,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048889692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637067834] [2021-07-09 17:15:19,944 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 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 [2021-07-09 17:15:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:19,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637067834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:19,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:19,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743734483] [2021-07-09 17:15:19,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:19,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:19,997 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 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) [2021-07-09 17:15:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:20,125 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-07-09 17:15:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:20,126 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 [2021-07-09 17:15:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:20,132 INFO L225 Difference]: With dead ends: 3252 [2021-07-09 17:15:20,132 INFO L226 Difference]: Without dead ends: 3250 [2021-07-09 17:15:20,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-07-09 17:15:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-07-09 17:15:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-07-09 17:15:20,187 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-07-09 17:15:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:20,187 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-07-09 17:15:20,187 INFO L483 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) [2021-07-09 17:15:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-07-09 17:15:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:20,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:20,191 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:20,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-07-09 17:15:20,392 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-07-09 17:15:20,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:20,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171599916] [2021-07-09 17:15:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:20,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:20,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171599916] [2021-07-09 17:15:20,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171599916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260888437] [2021-07-09 17:15:20,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:20,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:20,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260888437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:20,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:20,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800871002] [2021-07-09 17:15:20,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:20,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:20,513 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 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) [2021-07-09 17:15:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:20,572 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-07-09 17:15:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:15:20,572 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 [2021-07-09 17:15:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:20,578 INFO L225 Difference]: With dead ends: 3239 [2021-07-09 17:15:20,579 INFO L226 Difference]: Without dead ends: 3239 [2021-07-09 17:15:20,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-07-09 17:15:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-07-09 17:15:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-07-09 17:15:20,647 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-07-09 17:15:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:20,647 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-07-09 17:15:20,647 INFO L483 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) [2021-07-09 17:15:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-07-09 17:15:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:20,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:20,650 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:20,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3042,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:20,861 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-07-09 17:15:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:20,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960886390] [2021-07-09 17:15:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:20,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:20,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960886390] [2021-07-09 17:15:20,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960886390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085468796] [2021-07-09 17:15:20,918 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 [2021-07-09 17:15:20,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:20,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085468796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:20,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:20,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612895556] [2021-07-09 17:15:20,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:20,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:20,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:20,978 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 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) [2021-07-09 17:15:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:21,062 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-07-09 17:15:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:21,062 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 [2021-07-09 17:15:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:21,068 INFO L225 Difference]: With dead ends: 3341 [2021-07-09 17:15:21,069 INFO L226 Difference]: Without dead ends: 3341 [2021-07-09 17:15:21,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-07-09 17:15:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-07-09 17:15:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-07-09 17:15:21,116 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-07-09 17:15:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:21,116 INFO L482 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-07-09 17:15:21,116 INFO L483 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) [2021-07-09 17:15:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-07-09 17:15:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:21,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:21,120 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:21,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3043,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:21,320 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-07-09 17:15:21,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:21,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891111217] [2021-07-09 17:15:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891111217] [2021-07-09 17:15:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891111217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367042219] [2021-07-09 17:15:21,374 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 [2021-07-09 17:15:21,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367042219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:21,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:21,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101193595] [2021-07-09 17:15:21,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:21,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:21,450 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 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) [2021-07-09 17:15:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:21,545 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-07-09 17:15:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:21,545 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 [2021-07-09 17:15:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:21,554 INFO L225 Difference]: With dead ends: 4613 [2021-07-09 17:15:21,554 INFO L226 Difference]: Without dead ends: 4613 [2021-07-09 17:15:21,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-07-09 17:15:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-07-09 17:15:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-07-09 17:15:21,623 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-07-09 17:15:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:21,623 INFO L482 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-07-09 17:15:21,623 INFO L483 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) [2021-07-09 17:15:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-07-09 17:15:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:21,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:21,627 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:21,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-07-09 17:15:21,828 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-07-09 17:15:21,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:21,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846047999] [2021-07-09 17:15:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:21,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:21,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846047999] [2021-07-09 17:15:21,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846047999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019719659] [2021-07-09 17:15:21,882 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 [2021-07-09 17:15:21,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:21,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:21,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019719659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:21,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791303036] [2021-07-09 17:15:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:21,960 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 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) [2021-07-09 17:15:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:22,086 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-07-09 17:15:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:15:22,087 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 [2021-07-09 17:15:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:22,098 INFO L225 Difference]: With dead ends: 5440 [2021-07-09 17:15:22,099 INFO L226 Difference]: Without dead ends: 5440 [2021-07-09 17:15:22,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-07-09 17:15:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-07-09 17:15:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-07-09 17:15:22,205 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-07-09 17:15:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:22,205 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-07-09 17:15:22,205 INFO L483 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) [2021-07-09 17:15:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-07-09 17:15:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:22,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:22,209 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:22,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-07-09 17:15:22,417 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-07-09 17:15:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623220645] [2021-07-09 17:15:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:22,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:22,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623220645] [2021-07-09 17:15:22,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623220645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:22,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980880948] [2021-07-09 17:15:22,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:22,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980880948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:22,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:22,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609527153] [2021-07-09 17:15:22,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:22,560 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 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) [2021-07-09 17:15:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:22,749 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-07-09 17:15:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:22,750 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 [2021-07-09 17:15:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:22,761 INFO L225 Difference]: With dead ends: 6110 [2021-07-09 17:15:22,762 INFO L226 Difference]: Without dead ends: 6110 [2021-07-09 17:15:22,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:15:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-07-09 17:15:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-07-09 17:15:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-07-09 17:15:22,881 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-07-09 17:15:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:22,881 INFO L482 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-07-09 17:15:22,881 INFO L483 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) [2021-07-09 17:15:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-07-09 17:15:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:22,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:22,886 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:23,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:23,101 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-07-09 17:15:23,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258999043] [2021-07-09 17:15:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:23,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258999043] [2021-07-09 17:15:23,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258999043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940013768] [2021-07-09 17:15:23,162 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 [2021-07-09 17:15:23,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:23,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940013768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:23,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:15:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590429035] [2021-07-09 17:15:23,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:15:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:15:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:15:23,217 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 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) [2021-07-09 17:15:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:23,368 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-07-09 17:15:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:23,369 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 20 [2021-07-09 17:15:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:23,386 INFO L225 Difference]: With dead ends: 7038 [2021-07-09 17:15:23,386 INFO L226 Difference]: Without dead ends: 7034 [2021-07-09 17:15:23,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:15:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-07-09 17:15:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-07-09 17:15:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-07-09 17:15:23,551 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-07-09 17:15:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:23,551 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-07-09 17:15:23,551 INFO L483 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) [2021-07-09 17:15:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-07-09 17:15:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:23,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:23,557 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:23,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:23,765 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-07-09 17:15:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:23,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95126115] [2021-07-09 17:15:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:23,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:23,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95126115] [2021-07-09 17:15:23,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95126115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701622312] [2021-07-09 17:15:23,814 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 [2021-07-09 17:15:23,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:23,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701622312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:23,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189115441] [2021-07-09 17:15:23,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:23,876 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 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) [2021-07-09 17:15:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:23,986 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-07-09 17:15:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:23,986 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 [2021-07-09 17:15:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:24,003 INFO L225 Difference]: With dead ends: 7707 [2021-07-09 17:15:24,004 INFO L226 Difference]: Without dead ends: 7707 [2021-07-09 17:15:24,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-07-09 17:15:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-07-09 17:15:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-07-09 17:15:24,143 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-07-09 17:15:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:24,143 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-07-09 17:15:24,143 INFO L483 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) [2021-07-09 17:15:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-07-09 17:15:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:24,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:24,149 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:24,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:24,352 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-07-09 17:15:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:24,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482323422] [2021-07-09 17:15:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:24,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482323422] [2021-07-09 17:15:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482323422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877306983] [2021-07-09 17:15:24,403 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 [2021-07-09 17:15:24,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:24,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:24,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:24,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877306983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:24,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:24,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:24,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176598700] [2021-07-09 17:15:24,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:24,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:24,462 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 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) [2021-07-09 17:15:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:24,585 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-07-09 17:15:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:15:24,585 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 [2021-07-09 17:15:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:24,603 INFO L225 Difference]: With dead ends: 8954 [2021-07-09 17:15:24,603 INFO L226 Difference]: Without dead ends: 8954 [2021-07-09 17:15:24,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-07-09 17:15:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-07-09 17:15:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-07-09 17:15:24,763 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-07-09 17:15:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:24,763 INFO L482 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-07-09 17:15:24,763 INFO L483 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) [2021-07-09 17:15:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-07-09 17:15:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:24,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:24,768 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:24,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3049,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:24,969 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-07-09 17:15:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:24,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633420641] [2021-07-09 17:15:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:25,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:25,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633420641] [2021-07-09 17:15:25,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633420641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:25,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126976114] [2021-07-09 17:15:25,021 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 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 [2021-07-09 17:15:25,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:25,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126976114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:25,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:25,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140853705] [2021-07-09 17:15:25,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:25,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:25,080 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 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) [2021-07-09 17:15:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:25,241 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-07-09 17:15:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:25,241 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 [2021-07-09 17:15:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:25,260 INFO L225 Difference]: With dead ends: 9105 [2021-07-09 17:15:25,261 INFO L226 Difference]: Without dead ends: 9105 [2021-07-09 17:15:25,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-07-09 17:15:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-07-09 17:15:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-07-09 17:15:25,440 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-07-09 17:15:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:25,440 INFO L482 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-07-09 17:15:25,440 INFO L483 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) [2021-07-09 17:15:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-07-09 17:15:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:25,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:25,446 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:25,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-07-09 17:15:25,646 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-07-09 17:15:25,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:25,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631821253] [2021-07-09 17:15:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:25,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631821253] [2021-07-09 17:15:25,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631821253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567806502] [2021-07-09 17:15:25,694 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 [2021-07-09 17:15:25,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:25,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567806502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252705851] [2021-07-09 17:15:25,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:25,803 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 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) [2021-07-09 17:15:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:25,923 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-07-09 17:15:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:15:25,923 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 [2021-07-09 17:15:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:25,945 INFO L225 Difference]: With dead ends: 9529 [2021-07-09 17:15:25,945 INFO L226 Difference]: Without dead ends: 9529 [2021-07-09 17:15:25,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-07-09 17:15:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-07-09 17:15:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-07-09 17:15:26,066 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-07-09 17:15:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:26,066 INFO L482 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-07-09 17:15:26,066 INFO L483 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) [2021-07-09 17:15:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-07-09 17:15:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:26,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:26,070 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:26,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-07-09 17:15:26,271 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:26,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-07-09 17:15:26,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:26,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96461226] [2021-07-09 17:15:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:26,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96461226] [2021-07-09 17:15:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96461226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728774822] [2021-07-09 17:15:26,343 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 [2021-07-09 17:15:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728774822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:26,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:26,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:26,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904780867] [2021-07-09 17:15:26,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:26,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:26,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:26,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:26,405 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 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) [2021-07-09 17:15:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:26,540 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-07-09 17:15:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:15:26,540 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 [2021-07-09 17:15:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:26,551 INFO L225 Difference]: With dead ends: 5911 [2021-07-09 17:15:26,551 INFO L226 Difference]: Without dead ends: 5911 [2021-07-09 17:15:26,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-07-09 17:15:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-07-09 17:15:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-07-09 17:15:26,641 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-07-09 17:15:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:26,641 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-07-09 17:15:26,641 INFO L483 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) [2021-07-09 17:15:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-07-09 17:15:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:26,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:26,645 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:26,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3052,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:26,846 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:26,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-07-09 17:15:26,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:26,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154181602] [2021-07-09 17:15:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:26,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:26,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154181602] [2021-07-09 17:15:26,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154181602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:26,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074983637] [2021-07-09 17:15:26,904 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 [2021-07-09 17:15:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:26,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:26,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074983637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:26,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:26,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:26,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941484015] [2021-07-09 17:15:26,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:26,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:26,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:26,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:26,962 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 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) [2021-07-09 17:15:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:27,170 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-07-09 17:15:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:27,170 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 [2021-07-09 17:15:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:27,179 INFO L225 Difference]: With dead ends: 5172 [2021-07-09 17:15:27,179 INFO L226 Difference]: Without dead ends: 5172 [2021-07-09 17:15:27,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:15:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-07-09 17:15:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-07-09 17:15:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-07-09 17:15:27,264 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-07-09 17:15:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:27,264 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-07-09 17:15:27,264 INFO L483 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) [2021-07-09 17:15:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-07-09 17:15:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:27,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:27,268 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:27,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-07-09 17:15:27,469 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-07-09 17:15:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:27,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538192655] [2021-07-09 17:15:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:27,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:27,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538192655] [2021-07-09 17:15:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538192655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130778877] [2021-07-09 17:15:27,522 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 [2021-07-09 17:15:27,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:27,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130778877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:27,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371727787] [2021-07-09 17:15:27,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:27,582 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 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) [2021-07-09 17:15:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:27,739 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-07-09 17:15:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:27,740 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 [2021-07-09 17:15:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:27,748 INFO L225 Difference]: With dead ends: 4711 [2021-07-09 17:15:27,749 INFO L226 Difference]: Without dead ends: 4707 [2021-07-09 17:15:27,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-07-09 17:15:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-07-09 17:15:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-07-09 17:15:27,826 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-07-09 17:15:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:27,826 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-07-09 17:15:27,826 INFO L483 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) [2021-07-09 17:15:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-07-09 17:15:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:27,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:27,830 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:28,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-07-09 17:15:28,030 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-07-09 17:15:28,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488009285] [2021-07-09 17:15:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:28,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488009285] [2021-07-09 17:15:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488009285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414728832] [2021-07-09 17:15:28,080 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 [2021-07-09 17:15:28,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:28,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414728832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:28,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:28,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:28,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896653946] [2021-07-09 17:15:28,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:28,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:28,148 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 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) [2021-07-09 17:15:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:28,219 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-07-09 17:15:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:28,220 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 [2021-07-09 17:15:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:28,228 INFO L225 Difference]: With dead ends: 4367 [2021-07-09 17:15:28,228 INFO L226 Difference]: Without dead ends: 4367 [2021-07-09 17:15:28,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-07-09 17:15:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-07-09 17:15:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-07-09 17:15:28,311 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-07-09 17:15:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:28,311 INFO L482 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-07-09 17:15:28,311 INFO L483 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) [2021-07-09 17:15:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-07-09 17:15:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:28,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:28,315 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:28,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-07-09 17:15:28,516 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-07-09 17:15:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018580047] [2021-07-09 17:15:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:28,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018580047] [2021-07-09 17:15:28,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018580047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193604875] [2021-07-09 17:15:28,575 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 [2021-07-09 17:15:28,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:28,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193604875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:28,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:28,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315616006] [2021-07-09 17:15:28,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:28,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:28,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:28,638 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 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) [2021-07-09 17:15:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:28,709 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-07-09 17:15:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:15:28,709 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 [2021-07-09 17:15:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:28,717 INFO L225 Difference]: With dead ends: 4294 [2021-07-09 17:15:28,717 INFO L226 Difference]: Without dead ends: 4294 [2021-07-09 17:15:28,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:15:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-07-09 17:15:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-07-09 17:15:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-07-09 17:15:28,782 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-07-09 17:15:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:28,782 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-07-09 17:15:28,782 INFO L483 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) [2021-07-09 17:15:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-07-09 17:15:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:28,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:28,785 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:28,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-07-09 17:15:28,985 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-07-09 17:15:28,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:28,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9087143] [2021-07-09 17:15:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:29,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:29,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9087143] [2021-07-09 17:15:29,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9087143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413498627] [2021-07-09 17:15:29,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:29,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:29,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413498627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:29,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:29,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896519571] [2021-07-09 17:15:29,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:29,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:29,105 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 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) [2021-07-09 17:15:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:29,215 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-07-09 17:15:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:29,216 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 [2021-07-09 17:15:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:29,223 INFO L225 Difference]: With dead ends: 4333 [2021-07-09 17:15:29,223 INFO L226 Difference]: Without dead ends: 4333 [2021-07-09 17:15:29,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-07-09 17:15:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-07-09 17:15:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-07-09 17:15:29,286 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-07-09 17:15:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:29,286 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-07-09 17:15:29,286 INFO L483 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) [2021-07-09 17:15:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-07-09 17:15:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:29,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:29,289 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:29,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:29,497 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-07-09 17:15:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:29,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495889479] [2021-07-09 17:15:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495889479] [2021-07-09 17:15:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495889479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863948848] [2021-07-09 17:15:29,560 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 [2021-07-09 17:15:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:29,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863948848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:29,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125736547] [2021-07-09 17:15:29,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:29,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:29,624 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 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) [2021-07-09 17:15:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:29,733 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-07-09 17:15:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:29,733 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 [2021-07-09 17:15:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:29,742 INFO L225 Difference]: With dead ends: 5075 [2021-07-09 17:15:29,742 INFO L226 Difference]: Without dead ends: 5075 [2021-07-09 17:15:29,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:15:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-07-09 17:15:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-07-09 17:15:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-07-09 17:15:29,812 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-07-09 17:15:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:29,812 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-07-09 17:15:29,812 INFO L483 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) [2021-07-09 17:15:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-07-09 17:15:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:29,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:29,815 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:30,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:30,016 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-07-09 17:15:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:30,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450827343] [2021-07-09 17:15:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:30,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:30,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450827343] [2021-07-09 17:15:30,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450827343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:30,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807406806] [2021-07-09 17:15:30,078 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 [2021-07-09 17:15:30,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:30,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:30,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807406806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:30,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:30,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:30,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579631950] [2021-07-09 17:15:30,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:30,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:30,145 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 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) [2021-07-09 17:15:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:30,303 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-07-09 17:15:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:30,303 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 [2021-07-09 17:15:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:30,312 INFO L225 Difference]: With dead ends: 4713 [2021-07-09 17:15:30,312 INFO L226 Difference]: Without dead ends: 4713 [2021-07-09 17:15:30,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-07-09 17:15:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-07-09 17:15:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-07-09 17:15:30,383 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-07-09 17:15:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:30,383 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-07-09 17:15:30,383 INFO L483 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) [2021-07-09 17:15:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-07-09 17:15:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:30,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:30,387 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:30,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:30,587 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-07-09 17:15:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:30,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330484427] [2021-07-09 17:15:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:30,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330484427] [2021-07-09 17:15:30,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330484427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475210024] [2021-07-09 17:15:30,652 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 [2021-07-09 17:15:30,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:30,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:30,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:30,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475210024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:30,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670578143] [2021-07-09 17:15:30,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:30,718 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 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) [2021-07-09 17:15:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:30,961 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-07-09 17:15:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:15:30,962 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 [2021-07-09 17:15:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:30,970 INFO L225 Difference]: With dead ends: 5066 [2021-07-09 17:15:30,971 INFO L226 Difference]: Without dead ends: 5066 [2021-07-09 17:15:30,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:15:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-07-09 17:15:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-07-09 17:15:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-07-09 17:15:31,059 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-07-09 17:15:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:31,059 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-07-09 17:15:31,059 INFO L483 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) [2021-07-09 17:15:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-07-09 17:15:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:31,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:31,063 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:31,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:31,264 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-07-09 17:15:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:31,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751581451] [2021-07-09 17:15:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:31,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:31,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751581451] [2021-07-09 17:15:31,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751581451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:31,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536438746] [2021-07-09 17:15:31,308 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 [2021-07-09 17:15:31,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:31,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:31,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536438746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:31,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:31,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61875471] [2021-07-09 17:15:31,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:31,361 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 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) [2021-07-09 17:15:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:31,516 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-07-09 17:15:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:31,516 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 [2021-07-09 17:15:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:31,525 INFO L225 Difference]: With dead ends: 5249 [2021-07-09 17:15:31,525 INFO L226 Difference]: Without dead ends: 5245 [2021-07-09 17:15:31,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-07-09 17:15:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-07-09 17:15:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-07-09 17:15:31,605 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-07-09 17:15:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:31,606 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-07-09 17:15:31,606 INFO L483 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) [2021-07-09 17:15:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-07-09 17:15:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:31,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:31,610 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:31,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-07-09 17:15:31,829 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-07-09 17:15:31,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:31,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993863043] [2021-07-09 17:15:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:31,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:31,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993863043] [2021-07-09 17:15:31,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993863043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:31,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228416096] [2021-07-09 17:15:31,884 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 [2021-07-09 17:15:31,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:31,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:31,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228416096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:31,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:31,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:31,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98723298] [2021-07-09 17:15:31,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:31,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:31,941 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 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) [2021-07-09 17:15:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:32,084 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-07-09 17:15:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:32,085 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 [2021-07-09 17:15:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:32,095 INFO L225 Difference]: With dead ends: 5919 [2021-07-09 17:15:32,095 INFO L226 Difference]: Without dead ends: 5919 [2021-07-09 17:15:32,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-07-09 17:15:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-07-09 17:15:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-07-09 17:15:32,179 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-07-09 17:15:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:32,179 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-07-09 17:15:32,179 INFO L483 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) [2021-07-09 17:15:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-07-09 17:15:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:32,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:32,183 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:32,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:32,384 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-07-09 17:15:32,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:32,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817230723] [2021-07-09 17:15:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:32,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817230723] [2021-07-09 17:15:32,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817230723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946326984] [2021-07-09 17:15:32,462 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 [2021-07-09 17:15:32,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:32,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946326984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:32,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:32,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742637992] [2021-07-09 17:15:32,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:32,555 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 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) [2021-07-09 17:15:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:32,692 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-07-09 17:15:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:32,693 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 [2021-07-09 17:15:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:32,703 INFO L225 Difference]: With dead ends: 6269 [2021-07-09 17:15:32,703 INFO L226 Difference]: Without dead ends: 6269 [2021-07-09 17:15:32,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-07-09 17:15:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-07-09 17:15:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-07-09 17:15:32,783 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-07-09 17:15:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:32,783 INFO L482 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-07-09 17:15:32,784 INFO L483 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) [2021-07-09 17:15:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-07-09 17:15:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:32,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:32,787 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:32,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-07-09 17:15:32,988 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-07-09 17:15:32,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:32,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793015919] [2021-07-09 17:15:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:33,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793015919] [2021-07-09 17:15:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793015919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997900038] [2021-07-09 17:15:33,047 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 [2021-07-09 17:15:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997900038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:33,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:33,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516248989] [2021-07-09 17:15:33,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:33,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:33,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:33,102 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 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) [2021-07-09 17:15:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:33,294 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-07-09 17:15:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:33,295 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 [2021-07-09 17:15:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:33,304 INFO L225 Difference]: With dead ends: 5453 [2021-07-09 17:15:33,304 INFO L226 Difference]: Without dead ends: 5453 [2021-07-09 17:15:33,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:15:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-07-09 17:15:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-07-09 17:15:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-07-09 17:15:33,382 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-07-09 17:15:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-07-09 17:15:33,383 INFO L483 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) [2021-07-09 17:15:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-07-09 17:15:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:33,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:33,387 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:33,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-07-09 17:15:33,601 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-07-09 17:15:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:33,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92630577] [2021-07-09 17:15:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:33,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:33,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92630577] [2021-07-09 17:15:33,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92630577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280469690] [2021-07-09 17:15:33,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:33,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:33,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280469690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:33,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541903546] [2021-07-09 17:15:33,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:33,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:33,749 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 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) [2021-07-09 17:15:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:33,883 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-07-09 17:15:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:33,883 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 [2021-07-09 17:15:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:33,893 INFO L225 Difference]: With dead ends: 5535 [2021-07-09 17:15:33,893 INFO L226 Difference]: Without dead ends: 5535 [2021-07-09 17:15:33,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-07-09 17:15:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-07-09 17:15:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-07-09 17:15:33,964 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-07-09 17:15:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:33,964 INFO L482 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-07-09 17:15:33,965 INFO L483 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) [2021-07-09 17:15:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-07-09 17:15:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:33,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:33,968 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:34,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3065 [2021-07-09 17:15:34,169 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-07-09 17:15:34,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:34,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669368709] [2021-07-09 17:15:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:34,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:34,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669368709] [2021-07-09 17:15:34,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669368709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:34,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470266158] [2021-07-09 17:15:34,226 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 [2021-07-09 17:15:34,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:34,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470266158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:34,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:34,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437663966] [2021-07-09 17:15:34,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:34,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:34,293 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 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) [2021-07-09 17:15:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:34,449 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-07-09 17:15:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:34,450 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 [2021-07-09 17:15:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:34,459 INFO L225 Difference]: With dead ends: 4959 [2021-07-09 17:15:34,459 INFO L226 Difference]: Without dead ends: 4959 [2021-07-09 17:15:34,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-07-09 17:15:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-07-09 17:15:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-07-09 17:15:34,534 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-07-09 17:15:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:34,535 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-07-09 17:15:34,535 INFO L483 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) [2021-07-09 17:15:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-07-09 17:15:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:34,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:34,538 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:34,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-07-09 17:15:34,739 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-07-09 17:15:34,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:34,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307533064] [2021-07-09 17:15:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:34,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:34,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307533064] [2021-07-09 17:15:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307533064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923989506] [2021-07-09 17:15:34,796 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 [2021-07-09 17:15:34,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923989506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:34,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95402349] [2021-07-09 17:15:34,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:34,857 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 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) [2021-07-09 17:15:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:35,100 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-07-09 17:15:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:15:35,101 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 [2021-07-09 17:15:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:35,109 INFO L225 Difference]: With dead ends: 4630 [2021-07-09 17:15:35,109 INFO L226 Difference]: Without dead ends: 4630 [2021-07-09 17:15:35,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:15:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-07-09 17:15:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-07-09 17:15:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-07-09 17:15:35,166 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-07-09 17:15:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:35,166 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-07-09 17:15:35,166 INFO L483 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) [2021-07-09 17:15:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-07-09 17:15:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:35,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:35,170 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:35,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 17:15:35,386 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-07-09 17:15:35,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:35,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671836779] [2021-07-09 17:15:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:35,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:35,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671836779] [2021-07-09 17:15:35,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671836779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:35,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288811825] [2021-07-09 17:15:35,437 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 [2021-07-09 17:15:35,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:35,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288811825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:35,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:35,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:35,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129041357] [2021-07-09 17:15:35,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:35,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:35,498 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 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) [2021-07-09 17:15:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:35,658 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-07-09 17:15:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:35,658 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 [2021-07-09 17:15:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:35,665 INFO L225 Difference]: With dead ends: 4118 [2021-07-09 17:15:35,665 INFO L226 Difference]: Without dead ends: 4114 [2021-07-09 17:15:35,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-07-09 17:15:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-07-09 17:15:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-07-09 17:15:35,723 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-07-09 17:15:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:35,723 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-07-09 17:15:35,723 INFO L483 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) [2021-07-09 17:15:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-07-09 17:15:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:35,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:35,727 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:35,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:35,927 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-07-09 17:15:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:35,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933781067] [2021-07-09 17:15:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:35,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:35,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933781067] [2021-07-09 17:15:35,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933781067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:35,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152453988] [2021-07-09 17:15:35,984 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 [2021-07-09 17:15:36,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:36,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152453988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:36,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:36,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:36,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002368639] [2021-07-09 17:15:36,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:36,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:36,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:36,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:36,053 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 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) [2021-07-09 17:15:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:36,139 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-07-09 17:15:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:36,141 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 [2021-07-09 17:15:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:36,147 INFO L225 Difference]: With dead ends: 4108 [2021-07-09 17:15:36,148 INFO L226 Difference]: Without dead ends: 4108 [2021-07-09 17:15:36,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:15:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-07-09 17:15:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-07-09 17:15:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-07-09 17:15:36,212 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-07-09 17:15:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:36,212 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-07-09 17:15:36,212 INFO L483 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) [2021-07-09 17:15:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-07-09 17:15:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:36,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:36,217 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:36,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:36,417 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-07-09 17:15:36,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:36,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186747340] [2021-07-09 17:15:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:36,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:36,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186747340] [2021-07-09 17:15:36,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186747340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:36,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248719375] [2021-07-09 17:15:36,465 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 [2021-07-09 17:15:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248719375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:36,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302590991] [2021-07-09 17:15:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:36,556 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 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) [2021-07-09 17:15:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:36,641 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-07-09 17:15:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:36,642 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 [2021-07-09 17:15:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:36,649 INFO L225 Difference]: With dead ends: 4122 [2021-07-09 17:15:36,649 INFO L226 Difference]: Without dead ends: 4122 [2021-07-09 17:15:36,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-07-09 17:15:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-07-09 17:15:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-07-09 17:15:36,706 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-07-09 17:15:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:36,706 INFO L482 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-07-09 17:15:36,706 INFO L483 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) [2021-07-09 17:15:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-07-09 17:15:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:36,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:36,709 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:36,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3070,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:36,910 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-07-09 17:15:36,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:36,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422066748] [2021-07-09 17:15:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:36,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422066748] [2021-07-09 17:15:36,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422066748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534870408] [2021-07-09 17:15:36,962 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 [2021-07-09 17:15:36,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:37,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534870408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:37,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:37,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:37,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122449123] [2021-07-09 17:15:37,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:37,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:37,025 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 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) [2021-07-09 17:15:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:37,125 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-07-09 17:15:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:15:37,126 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 [2021-07-09 17:15:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:37,135 INFO L225 Difference]: With dead ends: 5426 [2021-07-09 17:15:37,135 INFO L226 Difference]: Without dead ends: 5426 [2021-07-09 17:15:37,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-07-09 17:15:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-07-09 17:15:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-07-09 17:15:37,213 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-07-09 17:15:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:37,213 INFO L482 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-07-09 17:15:37,213 INFO L483 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) [2021-07-09 17:15:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-07-09 17:15:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:37,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:37,217 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:37,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:37,418 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:37,418 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-07-09 17:15:37,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:37,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099908977] [2021-07-09 17:15:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:37,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:37,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099908977] [2021-07-09 17:15:37,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099908977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:37,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502071647] [2021-07-09 17:15:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:37,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:37,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502071647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:37,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:37,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778583912] [2021-07-09 17:15:37,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:37,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:37,559 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 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) [2021-07-09 17:15:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:37,672 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-07-09 17:15:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:37,672 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 [2021-07-09 17:15:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:37,682 INFO L225 Difference]: With dead ends: 5508 [2021-07-09 17:15:37,682 INFO L226 Difference]: Without dead ends: 5508 [2021-07-09 17:15:37,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-07-09 17:15:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-07-09 17:15:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-07-09 17:15:37,766 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-07-09 17:15:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:37,766 INFO L482 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-07-09 17:15:37,766 INFO L483 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) [2021-07-09 17:15:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-07-09 17:15:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:37,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:37,771 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:37,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-07-09 17:15:37,971 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:37,972 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-07-09 17:15:37,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:37,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483601490] [2021-07-09 17:15:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:38,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483601490] [2021-07-09 17:15:38,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483601490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40661982] [2021-07-09 17:15:38,030 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 [2021-07-09 17:15:38,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:38,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:38,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40661982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39405306] [2021-07-09 17:15:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:38,105 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 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) [2021-07-09 17:15:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:38,233 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-07-09 17:15:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:38,236 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 [2021-07-09 17:15:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:38,248 INFO L225 Difference]: With dead ends: 5808 [2021-07-09 17:15:38,248 INFO L226 Difference]: Without dead ends: 5808 [2021-07-09 17:15:38,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-07-09 17:15:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-07-09 17:15:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-07-09 17:15:38,337 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-07-09 17:15:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:38,337 INFO L482 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-07-09 17:15:38,337 INFO L483 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) [2021-07-09 17:15:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-07-09 17:15:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:38,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:38,342 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:38,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-07-09 17:15:38,557 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-07-09 17:15:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:38,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841022911] [2021-07-09 17:15:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:38,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:38,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841022911] [2021-07-09 17:15:38,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841022911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:38,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163157424] [2021-07-09 17:15:38,619 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 [2021-07-09 17:15:38,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:38,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:38,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:38,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163157424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:38,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:38,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:38,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119163872] [2021-07-09 17:15:38,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:38,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:38,689 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 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) [2021-07-09 17:15:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:38,924 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-07-09 17:15:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:38,925 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 [2021-07-09 17:15:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:38,936 INFO L225 Difference]: With dead ends: 6051 [2021-07-09 17:15:38,937 INFO L226 Difference]: Without dead ends: 6051 [2021-07-09 17:15:38,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:15:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-07-09 17:15:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-07-09 17:15:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-07-09 17:15:39,075 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-07-09 17:15:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:39,075 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-07-09 17:15:39,075 INFO L483 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) [2021-07-09 17:15:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-07-09 17:15:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:39,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:39,079 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:39,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:39,280 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-07-09 17:15:39,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:39,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681881491] [2021-07-09 17:15:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:39,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:39,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681881491] [2021-07-09 17:15:39,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681881491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:39,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821631642] [2021-07-09 17:15:39,341 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 [2021-07-09 17:15:39,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:39,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821631642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:39,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:39,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:39,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68151986] [2021-07-09 17:15:39,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:39,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:39,410 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 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) [2021-07-09 17:15:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:39,728 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-07-09 17:15:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:15:39,730 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 [2021-07-09 17:15:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:39,744 INFO L225 Difference]: With dead ends: 6305 [2021-07-09 17:15:39,744 INFO L226 Difference]: Without dead ends: 6305 [2021-07-09 17:15:39,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:15:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-07-09 17:15:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-07-09 17:15:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-07-09 17:15:39,846 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-07-09 17:15:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:39,847 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-07-09 17:15:39,847 INFO L483 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) [2021-07-09 17:15:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-07-09 17:15:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:39,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:39,852 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-07-09 17:15:40,053 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-07-09 17:15:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077045991] [2021-07-09 17:15:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:40,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077045991] [2021-07-09 17:15:40,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077045991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806693331] [2021-07-09 17:15:40,106 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 [2021-07-09 17:15:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806693331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:40,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709119420] [2021-07-09 17:15:40,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:40,165 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 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) [2021-07-09 17:15:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:40,365 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-07-09 17:15:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:15:40,366 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 [2021-07-09 17:15:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:40,377 INFO L225 Difference]: With dead ends: 6089 [2021-07-09 17:15:40,377 INFO L226 Difference]: Without dead ends: 6085 [2021-07-09 17:15:40,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:15:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-07-09 17:15:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-07-09 17:15:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-07-09 17:15:40,474 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-07-09 17:15:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:40,474 INFO L482 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-07-09 17:15:40,474 INFO L483 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) [2021-07-09 17:15:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-07-09 17:15:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:40,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:40,479 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:40,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3076,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:40,680 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-07-09 17:15:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:40,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216742668] [2021-07-09 17:15:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:40,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:40,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216742668] [2021-07-09 17:15:40,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216742668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849967103] [2021-07-09 17:15:40,776 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 [2021-07-09 17:15:40,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:40,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:40,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:40,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849967103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:40,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:40,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910799457] [2021-07-09 17:15:40,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:40,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:40,841 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 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) [2021-07-09 17:15:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:41,059 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-07-09 17:15:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:41,060 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 [2021-07-09 17:15:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:41,076 INFO L225 Difference]: With dead ends: 7476 [2021-07-09 17:15:41,076 INFO L226 Difference]: Without dead ends: 7476 [2021-07-09 17:15:41,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:15:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-07-09 17:15:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-07-09 17:15:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-07-09 17:15:41,197 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-07-09 17:15:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:41,197 INFO L482 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-07-09 17:15:41,197 INFO L483 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) [2021-07-09 17:15:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-07-09 17:15:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:41,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:41,202 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:41,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-07-09 17:15:41,403 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-07-09 17:15:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:41,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842535850] [2021-07-09 17:15:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:41,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:41,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842535850] [2021-07-09 17:15:41,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842535850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:41,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904598235] [2021-07-09 17:15:41,458 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 [2021-07-09 17:15:41,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:15:41,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:41,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:41,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904598235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:41,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:41,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854061807] [2021-07-09 17:15:41,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:41,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:41,524 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 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) [2021-07-09 17:15:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:41,715 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-07-09 17:15:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:41,715 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 [2021-07-09 17:15:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:41,730 INFO L225 Difference]: With dead ends: 7967 [2021-07-09 17:15:41,730 INFO L226 Difference]: Without dead ends: 7967 [2021-07-09 17:15:41,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:15:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-07-09 17:15:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-07-09 17:15:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-07-09 17:15:41,847 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-07-09 17:15:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:41,847 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-07-09 17:15:41,847 INFO L483 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) [2021-07-09 17:15:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-07-09 17:15:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:41,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:41,852 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:42,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-07-09 17:15:42,054 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-07-09 17:15:42,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:42,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005595392] [2021-07-09 17:15:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:42,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:42,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005595392] [2021-07-09 17:15:42,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005595392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:42,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149157620] [2021-07-09 17:15:42,109 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 [2021-07-09 17:15:42,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:42,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:42,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149157620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:42,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:42,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941135356] [2021-07-09 17:15:42,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:42,178 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 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) [2021-07-09 17:15:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:42,457 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-07-09 17:15:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:15:42,458 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 [2021-07-09 17:15:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:42,473 INFO L225 Difference]: With dead ends: 6867 [2021-07-09 17:15:42,473 INFO L226 Difference]: Without dead ends: 6867 [2021-07-09 17:15:42,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:15:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-07-09 17:15:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-07-09 17:15:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-07-09 17:15:42,581 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-07-09 17:15:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:42,581 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-07-09 17:15:42,581 INFO L483 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) [2021-07-09 17:15:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-07-09 17:15:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:42,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:42,586 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:42,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:42,788 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-07-09 17:15:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:42,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585735277] [2021-07-09 17:15:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:42,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:42,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585735277] [2021-07-09 17:15:42,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585735277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:42,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806870226] [2021-07-09 17:15:42,844 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 [2021-07-09 17:15:42,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:15:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:42,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806870226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:42,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:42,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:42,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045308432] [2021-07-09 17:15:42,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:42,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:42,913 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 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) [2021-07-09 17:15:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:43,078 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-07-09 17:15:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:43,078 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 [2021-07-09 17:15:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:43,091 INFO L225 Difference]: With dead ends: 6222 [2021-07-09 17:15:43,091 INFO L226 Difference]: Without dead ends: 6222 [2021-07-09 17:15:43,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-07-09 17:15:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-07-09 17:15:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-07-09 17:15:43,190 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-07-09 17:15:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:43,190 INFO L482 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-07-09 17:15:43,190 INFO L483 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) [2021-07-09 17:15:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-07-09 17:15:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:43,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:43,195 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:43,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:43,395 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:43,396 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-07-09 17:15:43,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:43,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805867875] [2021-07-09 17:15:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:43,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:43,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805867875] [2021-07-09 17:15:43,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805867875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:43,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693667552] [2021-07-09 17:15:43,457 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 [2021-07-09 17:15:43,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:15:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693667552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:43,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:43,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631938946] [2021-07-09 17:15:43,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:43,528 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 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) [2021-07-09 17:15:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:43,733 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-07-09 17:15:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:43,733 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 [2021-07-09 17:15:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:43,745 INFO L225 Difference]: With dead ends: 5885 [2021-07-09 17:15:43,745 INFO L226 Difference]: Without dead ends: 5885 [2021-07-09 17:15:43,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:15:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-07-09 17:15:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-07-09 17:15:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-07-09 17:15:43,838 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-07-09 17:15:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:43,838 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-07-09 17:15:43,838 INFO L483 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) [2021-07-09 17:15:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-07-09 17:15:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:43,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:43,844 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:44,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3081 [2021-07-09 17:15:44,045 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-07-09 17:15:44,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:44,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573165151] [2021-07-09 17:15:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:44,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573165151] [2021-07-09 17:15:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573165151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743943735] [2021-07-09 17:15:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:44,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743943735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:44,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:44,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251987587] [2021-07-09 17:15:44,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:44,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:44,183 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 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) [2021-07-09 17:15:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:44,500 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-07-09 17:15:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:15:44,500 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 [2021-07-09 17:15:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:44,510 INFO L225 Difference]: With dead ends: 6017 [2021-07-09 17:15:44,511 INFO L226 Difference]: Without dead ends: 6017 [2021-07-09 17:15:44,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:15:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-07-09 17:15:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-07-09 17:15:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-07-09 17:15:44,598 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-07-09 17:15:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:44,598 INFO L482 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-07-09 17:15:44,598 INFO L483 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) [2021-07-09 17:15:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-07-09 17:15:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:44,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:44,603 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:44,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-07-09 17:15:44,803 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-07-09 17:15:44,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:44,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204380525] [2021-07-09 17:15:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:44,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204380525] [2021-07-09 17:15:44,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204380525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091386428] [2021-07-09 17:15:44,852 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 [2021-07-09 17:15:44,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:44,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091386428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:44,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945517262] [2021-07-09 17:15:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:44,905 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 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) [2021-07-09 17:15:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:45,056 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-07-09 17:15:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:45,056 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 [2021-07-09 17:15:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:45,067 INFO L225 Difference]: With dead ends: 5764 [2021-07-09 17:15:45,067 INFO L226 Difference]: Without dead ends: 5760 [2021-07-09 17:15:45,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-07-09 17:15:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-07-09 17:15:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-07-09 17:15:45,157 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-07-09 17:15:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:45,157 INFO L482 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-07-09 17:15:45,157 INFO L483 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) [2021-07-09 17:15:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-07-09 17:15:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:45,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:45,162 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:45,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3083 [2021-07-09 17:15:45,363 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:45,363 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-07-09 17:15:45,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:45,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995796435] [2021-07-09 17:15:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:45,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:45,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995796435] [2021-07-09 17:15:45,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995796435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:45,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651933174] [2021-07-09 17:15:45,420 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 [2021-07-09 17:15:45,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:45,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651933174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:45,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:45,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:45,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904672233] [2021-07-09 17:15:45,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:45,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:45,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:45,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:45,479 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 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) [2021-07-09 17:15:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:45,573 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-07-09 17:15:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:45,573 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 [2021-07-09 17:15:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:45,584 INFO L225 Difference]: With dead ends: 5872 [2021-07-09 17:15:45,584 INFO L226 Difference]: Without dead ends: 5872 [2021-07-09 17:15:45,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-07-09 17:15:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-07-09 17:15:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-07-09 17:15:45,667 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-07-09 17:15:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-07-09 17:15:45,667 INFO L483 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) [2021-07-09 17:15:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-07-09 17:15:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:45,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:45,671 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:45,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:45,872 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-07-09 17:15:45,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:45,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070381003] [2021-07-09 17:15:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:45,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:45,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070381003] [2021-07-09 17:15:45,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070381003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:45,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069943687] [2021-07-09 17:15:45,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:45,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:45,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069943687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:45,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:45,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981076131] [2021-07-09 17:15:45,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:45,980 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 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) [2021-07-09 17:15:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:46,085 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-07-09 17:15:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:15:46,085 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 [2021-07-09 17:15:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:46,095 INFO L225 Difference]: With dead ends: 5951 [2021-07-09 17:15:46,095 INFO L226 Difference]: Without dead ends: 5951 [2021-07-09 17:15:46,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-07-09 17:15:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-07-09 17:15:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-07-09 17:15:46,186 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-07-09 17:15:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:46,187 INFO L482 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-07-09 17:15:46,187 INFO L483 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) [2021-07-09 17:15:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-07-09 17:15:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:46,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:46,192 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:46,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-07-09 17:15:46,392 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-07-09 17:15:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:46,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770632770] [2021-07-09 17:15:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:46,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770632770] [2021-07-09 17:15:46,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770632770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750776678] [2021-07-09 17:15:46,445 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 [2021-07-09 17:15:46,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:46,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:46,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:46,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750776678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:46,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:46,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:46,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278241504] [2021-07-09 17:15:46,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:46,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:46,519 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 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) [2021-07-09 17:15:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:46,641 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-07-09 17:15:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:46,642 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 [2021-07-09 17:15:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:46,655 INFO L225 Difference]: With dead ends: 7442 [2021-07-09 17:15:46,655 INFO L226 Difference]: Without dead ends: 7442 [2021-07-09 17:15:46,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-07-09 17:15:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-07-09 17:15:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-07-09 17:15:46,775 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-07-09 17:15:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:46,776 INFO L482 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-07-09 17:15:46,776 INFO L483 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) [2021-07-09 17:15:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-07-09 17:15:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:46,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:46,782 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:46,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3086 [2021-07-09 17:15:46,983 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-07-09 17:15:46,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:46,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797318824] [2021-07-09 17:15:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:47,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797318824] [2021-07-09 17:15:47,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797318824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578042384] [2021-07-09 17:15:47,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:47,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:47,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:47,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578042384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:47,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:47,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592068281] [2021-07-09 17:15:47,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:47,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:47,146 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 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) [2021-07-09 17:15:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:47,240 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-07-09 17:15:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:15:47,240 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 [2021-07-09 17:15:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:47,255 INFO L225 Difference]: With dead ends: 7460 [2021-07-09 17:15:47,256 INFO L226 Difference]: Without dead ends: 7460 [2021-07-09 17:15:47,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-07-09 17:15:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-07-09 17:15:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-07-09 17:15:47,382 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-07-09 17:15:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-07-09 17:15:47,383 INFO L483 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) [2021-07-09 17:15:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-07-09 17:15:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:47,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:47,388 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:47,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-09 17:15:47,605 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-07-09 17:15:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:47,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759252082] [2021-07-09 17:15:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:47,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759252082] [2021-07-09 17:15:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759252082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846978085] [2021-07-09 17:15:47,662 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 [2021-07-09 17:15:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:47,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846978085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:47,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43191095] [2021-07-09 17:15:47,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:47,735 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 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) [2021-07-09 17:15:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:47,877 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-07-09 17:15:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:47,878 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 [2021-07-09 17:15:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:47,892 INFO L225 Difference]: With dead ends: 7550 [2021-07-09 17:15:47,892 INFO L226 Difference]: Without dead ends: 7550 [2021-07-09 17:15:47,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-07-09 17:15:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-07-09 17:15:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-07-09 17:15:48,003 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-07-09 17:15:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:48,003 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-07-09 17:15:48,004 INFO L483 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) [2021-07-09 17:15:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-07-09 17:15:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:48,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:48,008 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:48,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-07-09 17:15:48,209 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-07-09 17:15:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418972045] [2021-07-09 17:15:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:48,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:48,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418972045] [2021-07-09 17:15:48,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418972045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:48,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382482491] [2021-07-09 17:15:48,266 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 [2021-07-09 17:15:48,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:48,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:48,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382482491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:48,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:48,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:48,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693527265] [2021-07-09 17:15:48,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:48,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:48,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:48,334 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 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) [2021-07-09 17:15:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:48,528 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-07-09 17:15:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:48,528 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 [2021-07-09 17:15:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:48,543 INFO L225 Difference]: With dead ends: 7595 [2021-07-09 17:15:48,543 INFO L226 Difference]: Without dead ends: 7595 [2021-07-09 17:15:48,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-07-09 17:15:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-07-09 17:15:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-07-09 17:15:48,662 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-07-09 17:15:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:48,662 INFO L482 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-07-09 17:15:48,662 INFO L483 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) [2021-07-09 17:15:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-07-09 17:15:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:48,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:48,668 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:48,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-07-09 17:15:48,868 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-07-09 17:15:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:48,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016158269] [2021-07-09 17:15:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:48,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016158269] [2021-07-09 17:15:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016158269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589381547] [2021-07-09 17:15:48,935 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 [2021-07-09 17:15:48,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589381547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406429610] [2021-07-09 17:15:49,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:49,012 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 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) [2021-07-09 17:15:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:49,270 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-07-09 17:15:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:15:49,272 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 [2021-07-09 17:15:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:49,287 INFO L225 Difference]: With dead ends: 7693 [2021-07-09 17:15:49,287 INFO L226 Difference]: Without dead ends: 7693 [2021-07-09 17:15:49,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:15:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-07-09 17:15:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-07-09 17:15:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-07-09 17:15:49,464 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-07-09 17:15:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:49,464 INFO L482 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-07-09 17:15:49,464 INFO L483 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) [2021-07-09 17:15:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-07-09 17:15:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:49,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:49,470 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:49,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:49,671 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-07-09 17:15:49,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:49,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383171225] [2021-07-09 17:15:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:49,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:49,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383171225] [2021-07-09 17:15:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383171225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:49,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803759133] [2021-07-09 17:15:49,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:49,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:49,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803759133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:49,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:49,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:49,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216607518] [2021-07-09 17:15:49,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:49,805 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 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) [2021-07-09 17:15:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:50,092 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-07-09 17:15:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:15:50,092 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 [2021-07-09 17:15:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:50,106 INFO L225 Difference]: With dead ends: 7927 [2021-07-09 17:15:50,106 INFO L226 Difference]: Without dead ends: 7927 [2021-07-09 17:15:50,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:15:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-07-09 17:15:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-07-09 17:15:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-07-09 17:15:50,229 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-07-09 17:15:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:50,230 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-07-09 17:15:50,230 INFO L483 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) [2021-07-09 17:15:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-07-09 17:15:50,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:50,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:50,235 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:50,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3091 [2021-07-09 17:15:50,436 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-07-09 17:15:50,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:50,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664361079] [2021-07-09 17:15:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:50,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664361079] [2021-07-09 17:15:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664361079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439964970] [2021-07-09 17:15:50,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:50,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:50,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:50,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:50,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439964970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:50,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:50,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:50,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282548881] [2021-07-09 17:15:50,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:50,561 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 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) [2021-07-09 17:15:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:50,776 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-07-09 17:15:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:15:50,776 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 20 [2021-07-09 17:15:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:50,791 INFO L225 Difference]: With dead ends: 7682 [2021-07-09 17:15:50,791 INFO L226 Difference]: Without dead ends: 7678 [2021-07-09 17:15:50,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-07-09 17:15:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-07-09 17:15:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-07-09 17:15:50,918 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-07-09 17:15:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:50,918 INFO L482 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-07-09 17:15:50,918 INFO L483 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) [2021-07-09 17:15:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-07-09 17:15:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:50,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:50,924 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:51,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3092,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:51,124 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-07-09 17:15:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850323586] [2021-07-09 17:15:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850323586] [2021-07-09 17:15:51,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850323586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144473854] [2021-07-09 17:15:51,191 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:51,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:15:51,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:51,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144473854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:51,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588288829] [2021-07-09 17:15:51,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:51,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:51,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:51,259 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 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) [2021-07-09 17:15:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:51,529 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-07-09 17:15:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:15:51,529 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 20 [2021-07-09 17:15:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:51,549 INFO L225 Difference]: With dead ends: 9451 [2021-07-09 17:15:51,549 INFO L226 Difference]: Without dead ends: 9451 [2021-07-09 17:15:51,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:15:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-07-09 17:15:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-07-09 17:15:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-07-09 17:15:51,742 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-07-09 17:15:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:51,742 INFO L482 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-07-09 17:15:51,742 INFO L483 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) [2021-07-09 17:15:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-07-09 17:15:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:51,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:51,748 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:51,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3093 [2021-07-09 17:15:51,948 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-07-09 17:15:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:51,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869682111] [2021-07-09 17:15:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:52,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869682111] [2021-07-09 17:15:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869682111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652299807] [2021-07-09 17:15:52,021 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 [2021-07-09 17:15:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:52,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652299807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:52,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:52,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968580476] [2021-07-09 17:15:52,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:52,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:52,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:52,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:52,085 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 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) [2021-07-09 17:15:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:52,330 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-07-09 17:15:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:15:52,330 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 20 [2021-07-09 17:15:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:52,346 INFO L225 Difference]: With dead ends: 8447 [2021-07-09 17:15:52,347 INFO L226 Difference]: Without dead ends: 8447 [2021-07-09 17:15:52,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:15:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-07-09 17:15:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-07-09 17:15:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-07-09 17:15:52,486 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-07-09 17:15:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:52,487 INFO L482 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-07-09 17:15:52,487 INFO L483 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) [2021-07-09 17:15:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-07-09 17:15:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:52,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:52,493 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:52,709 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-07-09 17:15:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:52,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888389688] [2021-07-09 17:15:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:52,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:52,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888389688] [2021-07-09 17:15:52,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888389688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353989962] [2021-07-09 17:15:52,775 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 [2021-07-09 17:15:52,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:52,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353989962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906152313] [2021-07-09 17:15:52,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:52,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:52,842 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 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) [2021-07-09 17:15:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:53,136 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-07-09 17:15:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:15:53,136 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 20 [2021-07-09 17:15:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:53,153 INFO L225 Difference]: With dead ends: 8546 [2021-07-09 17:15:53,154 INFO L226 Difference]: Without dead ends: 8546 [2021-07-09 17:15:53,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:15:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-07-09 17:15:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-07-09 17:15:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-07-09 17:15:53,293 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-07-09 17:15:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:53,293 INFO L482 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-07-09 17:15:53,293 INFO L483 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) [2021-07-09 17:15:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-07-09 17:15:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:53,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:53,299 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:53,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-07-09 17:15:53,499 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:53,499 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-07-09 17:15:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:53,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802859124] [2021-07-09 17:15:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:53,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802859124] [2021-07-09 17:15:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802859124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213715697] [2021-07-09 17:15:53,566 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 [2021-07-09 17:15:53,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:15:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:53,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213715697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:53,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:53,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598363372] [2021-07-09 17:15:53,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:53,637 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 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) [2021-07-09 17:15:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:53,861 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-07-09 17:15:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:53,861 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 20 [2021-07-09 17:15:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:53,876 INFO L225 Difference]: With dead ends: 8149 [2021-07-09 17:15:53,876 INFO L226 Difference]: Without dead ends: 8149 [2021-07-09 17:15:53,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:15:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-07-09 17:15:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-07-09 17:15:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-07-09 17:15:54,002 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-07-09 17:15:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:54,002 INFO L482 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-07-09 17:15:54,002 INFO L483 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) [2021-07-09 17:15:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-07-09 17:15:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:54,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:54,050 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:54,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-07-09 17:15:54,250 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:54,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-07-09 17:15:54,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:54,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914586948] [2021-07-09 17:15:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:54,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914586948] [2021-07-09 17:15:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914586948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531414996] [2021-07-09 17:15:54,321 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 [2021-07-09 17:15:54,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:54,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531414996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:54,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:54,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:54,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863799284] [2021-07-09 17:15:54,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:54,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:54,384 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 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) [2021-07-09 17:15:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:54,627 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-07-09 17:15:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:15:54,627 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 20 [2021-07-09 17:15:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:54,641 INFO L225 Difference]: With dead ends: 8079 [2021-07-09 17:15:54,642 INFO L226 Difference]: Without dead ends: 8079 [2021-07-09 17:15:54,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:15:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-07-09 17:15:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-07-09 17:15:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-07-09 17:15:54,768 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-07-09 17:15:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:54,768 INFO L482 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-07-09 17:15:54,768 INFO L483 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) [2021-07-09 17:15:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-07-09 17:15:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:54,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:54,774 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:54,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-07-09 17:15:54,985 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-07-09 17:15:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709925006] [2021-07-09 17:15:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:55,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709925006] [2021-07-09 17:15:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709925006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617103403] [2021-07-09 17:15:55,052 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 [2021-07-09 17:15:55,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:15:55,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617103403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:55,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280676909] [2021-07-09 17:15:55,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:55,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:55,119 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 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) [2021-07-09 17:15:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:55,428 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-07-09 17:15:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:15:55,429 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 20 [2021-07-09 17:15:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:55,444 INFO L225 Difference]: With dead ends: 8238 [2021-07-09 17:15:55,444 INFO L226 Difference]: Without dead ends: 8238 [2021-07-09 17:15:55,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:15:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-07-09 17:15:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-07-09 17:15:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-07-09 17:15:55,575 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-07-09 17:15:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:55,575 INFO L482 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-07-09 17:15:55,575 INFO L483 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) [2021-07-09 17:15:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-07-09 17:15:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:55,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:55,581 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:55,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3098 [2021-07-09 17:15:55,796 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:55,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-07-09 17:15:55,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:55,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955424216] [2021-07-09 17:15:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:55,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:55,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955424216] [2021-07-09 17:15:55,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955424216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971982272] [2021-07-09 17:15:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:15:55,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:15:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:55,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971982272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:55,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:55,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490653062] [2021-07-09 17:15:55,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:55,956 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 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) [2021-07-09 17:15:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:56,116 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-07-09 17:15:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:15:56,117 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 20 [2021-07-09 17:15:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:56,133 INFO L225 Difference]: With dead ends: 8648 [2021-07-09 17:15:56,134 INFO L226 Difference]: Without dead ends: 8646 [2021-07-09 17:15:56,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-07-09 17:15:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-07-09 17:15:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-07-09 17:15:56,277 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-07-09 17:15:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:56,277 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-07-09 17:15:56,278 INFO L483 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) [2021-07-09 17:15:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-07-09 17:15:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:56,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:56,284 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:56,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-07-09 17:15:56,486 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-07-09 17:15:56,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:56,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42918866] [2021-07-09 17:15:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:56,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:56,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42918866] [2021-07-09 17:15:56,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42918866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:56,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880883512] [2021-07-09 17:15:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:15:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:56,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:56,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880883512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:56,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:56,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:56,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131262119] [2021-07-09 17:15:56,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:56,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:56,598 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 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) [2021-07-09 17:15:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:56,718 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-07-09 17:15:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:15:56,719 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 20 [2021-07-09 17:15:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:56,734 INFO L225 Difference]: With dead ends: 8734 [2021-07-09 17:15:56,734 INFO L226 Difference]: Without dead ends: 8734 [2021-07-09 17:15:56,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-07-09 17:15:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-07-09 17:15:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-07-09 17:15:56,878 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-07-09 17:15:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:56,878 INFO L482 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-07-09 17:15:56,878 INFO L483 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) [2021-07-09 17:15:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-07-09 17:15:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:56,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:56,885 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:57,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-07-09 17:15:57,101 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-07-09 17:15:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:57,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853619353] [2021-07-09 17:15:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:57,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853619353] [2021-07-09 17:15:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853619353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66253894] [2021-07-09 17:15:57,148 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 [2021-07-09 17:15:57,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:57,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66253894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:57,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:57,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291318783] [2021-07-09 17:15:57,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:57,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:57,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:57,211 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 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) [2021-07-09 17:15:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:57,342 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-07-09 17:15:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:57,343 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 20 [2021-07-09 17:15:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:57,360 INFO L225 Difference]: With dead ends: 8819 [2021-07-09 17:15:57,360 INFO L226 Difference]: Without dead ends: 8819 [2021-07-09 17:15:57,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-07-09 17:15:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-07-09 17:15:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-07-09 17:15:57,496 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-07-09 17:15:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:57,496 INFO L482 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-07-09 17:15:57,496 INFO L483 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) [2021-07-09 17:15:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-07-09 17:15:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:57,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:57,502 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:57,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:57,702 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-07-09 17:15:57,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:57,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405567578] [2021-07-09 17:15:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:57,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:57,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405567578] [2021-07-09 17:15:57,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405567578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019858210] [2021-07-09 17:15:57,761 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 [2021-07-09 17:15:57,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:15:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:57,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019858210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:57,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:57,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721035063] [2021-07-09 17:15:57,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:57,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:57,823 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 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) [2021-07-09 17:15:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:57,958 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-07-09 17:15:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:15:57,958 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 20 [2021-07-09 17:15:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:57,977 INFO L225 Difference]: With dead ends: 10243 [2021-07-09 17:15:57,977 INFO L226 Difference]: Without dead ends: 10243 [2021-07-09 17:15:57,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-07-09 17:15:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-07-09 17:15:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-07-09 17:15:58,131 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-07-09 17:15:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-07-09 17:15:58,131 INFO L483 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) [2021-07-09 17:15:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-07-09 17:15:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:58,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:58,137 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:58,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:58,338 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:58,338 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-07-09 17:15:58,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:58,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210985122] [2021-07-09 17:15:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:58,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:58,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210985122] [2021-07-09 17:15:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210985122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016771309] [2021-07-09 17:15:58,394 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 [2021-07-09 17:15:58,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:58,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016771309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:58,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:58,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:58,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503080035] [2021-07-09 17:15:58,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:58,470 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 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) [2021-07-09 17:15:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:58,599 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-07-09 17:15:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:58,600 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 20 [2021-07-09 17:15:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:58,617 INFO L225 Difference]: With dead ends: 10149 [2021-07-09 17:15:58,618 INFO L226 Difference]: Without dead ends: 10149 [2021-07-09 17:15:58,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-07-09 17:15:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-07-09 17:15:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-07-09 17:15:58,795 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-07-09 17:15:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:58,795 INFO L482 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-07-09 17:15:58,795 INFO L483 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) [2021-07-09 17:15:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-07-09 17:15:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:58,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:58,801 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:59,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3103 [2021-07-09 17:15:59,009 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-07-09 17:15:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:59,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050970276] [2021-07-09 17:15:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:59,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050970276] [2021-07-09 17:15:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050970276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788740068] [2021-07-09 17:15:59,063 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 [2021-07-09 17:15:59,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:15:59,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:59,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:59,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788740068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:59,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:15:59,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639436919] [2021-07-09 17:15:59,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:59,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:59,123 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 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) [2021-07-09 17:15:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:59,216 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-07-09 17:15:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:15:59,217 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 20 [2021-07-09 17:15:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:59,235 INFO L225 Difference]: With dead ends: 10072 [2021-07-09 17:15:59,235 INFO L226 Difference]: Without dead ends: 10072 [2021-07-09 17:15:59,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-07-09 17:15:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-07-09 17:15:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-07-09 17:15:59,394 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-07-09 17:15:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:59,394 INFO L482 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-07-09 17:15:59,394 INFO L483 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) [2021-07-09 17:15:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-07-09 17:15:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:15:59,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:59,401 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:59,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3104,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:59,601 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-07-09 17:15:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:59,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634015333] [2021-07-09 17:15:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:59,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634015333] [2021-07-09 17:15:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634015333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942898040] [2021-07-09 17:15:59,665 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 [2021-07-09 17:15:59,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:15:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:15:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:59,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942898040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:59,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:15:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924176289] [2021-07-09 17:15:59,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:59,728 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 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) [2021-07-09 17:15:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:59,904 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-07-09 17:15:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:59,905 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 20 [2021-07-09 17:15:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:59,924 INFO L225 Difference]: With dead ends: 10101 [2021-07-09 17:15:59,924 INFO L226 Difference]: Without dead ends: 10101 [2021-07-09 17:15:59,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:15:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-07-09 17:16:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-07-09 17:16:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-07-09 17:16:00,089 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-07-09 17:16:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:00,089 INFO L482 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-07-09 17:16:00,089 INFO L483 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) [2021-07-09 17:16:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-07-09 17:16:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:16:00,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:00,096 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:00,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3105 [2021-07-09 17:16:00,296 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-07-09 17:16:00,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:00,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747136224] [2021-07-09 17:16:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:00,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:00,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747136224] [2021-07-09 17:16:00,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747136224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:00,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316445933] [2021-07-09 17:16:00,357 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 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 [2021-07-09 17:16:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316445933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:00,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:00,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:00,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300832015] [2021-07-09 17:16:00,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:00,418 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 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) [2021-07-09 17:16:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:00,598 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-07-09 17:16:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:00,598 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 20 [2021-07-09 17:16:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:00,616 INFO L225 Difference]: With dead ends: 10116 [2021-07-09 17:16:00,616 INFO L226 Difference]: Without dead ends: 10116 [2021-07-09 17:16:00,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:16:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-07-09 17:16:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-07-09 17:16:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-07-09 17:16:00,798 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-07-09 17:16:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:00,798 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-07-09 17:16:00,798 INFO L483 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) [2021-07-09 17:16:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-07-09 17:16:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:16:00,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:00,804 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:01,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:01,005 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-07-09 17:16:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:01,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063536682] [2021-07-09 17:16:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:01,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063536682] [2021-07-09 17:16:01,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063536682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695983650] [2021-07-09 17:16:01,070 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 [2021-07-09 17:16:01,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:01,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695983650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:01,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002524159] [2021-07-09 17:16:01,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:01,131 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 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) [2021-07-09 17:16:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:01,358 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-07-09 17:16:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:16:01,358 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 20 [2021-07-09 17:16:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:01,378 INFO L225 Difference]: With dead ends: 10234 [2021-07-09 17:16:01,378 INFO L226 Difference]: Without dead ends: 10234 [2021-07-09 17:16:01,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:16:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-07-09 17:16:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-07-09 17:16:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-07-09 17:16:01,545 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-07-09 17:16:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:01,545 INFO L482 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-07-09 17:16:01,545 INFO L483 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) [2021-07-09 17:16:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-07-09 17:16:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:16:01,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:01,552 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:01,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3107,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:01,752 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-07-09 17:16:01,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:01,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211606044] [2021-07-09 17:16:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:01,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211606044] [2021-07-09 17:16:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211606044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899403648] [2021-07-09 17:16:01,821 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 [2021-07-09 17:16:01,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:01,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:01,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899403648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:01,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563564016] [2021-07-09 17:16:01,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:01,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:01,884 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 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) [2021-07-09 17:16:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:02,135 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-07-09 17:16:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:16:02,136 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 20 [2021-07-09 17:16:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:02,155 INFO L225 Difference]: With dead ends: 10435 [2021-07-09 17:16:02,155 INFO L226 Difference]: Without dead ends: 10435 [2021-07-09 17:16:02,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:16:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-07-09 17:16:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-07-09 17:16:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-07-09 17:16:02,315 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-07-09 17:16:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:02,315 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-07-09 17:16:02,315 INFO L483 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) [2021-07-09 17:16:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-07-09 17:16:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:02,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:02,322 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:02,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3108 [2021-07-09 17:16:02,522 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-07-09 17:16:02,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:02,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220271117] [2021-07-09 17:16:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:02,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220271117] [2021-07-09 17:16:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220271117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593475747] [2021-07-09 17:16:02,592 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 [2021-07-09 17:16:02,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:02,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593475747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:02,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:02,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:02,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778503389] [2021-07-09 17:16:02,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:02,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:02,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:02,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:02,657 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 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) [2021-07-09 17:16:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:02,870 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-07-09 17:16:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:02,870 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 21 [2021-07-09 17:16:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:02,886 INFO L225 Difference]: With dead ends: 10126 [2021-07-09 17:16:02,887 INFO L226 Difference]: Without dead ends: 10123 [2021-07-09 17:16:02,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-07-09 17:16:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-07-09 17:16:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-07-09 17:16:03,038 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-07-09 17:16:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:03,038 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-07-09 17:16:03,038 INFO L483 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) [2021-07-09 17:16:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-07-09 17:16:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:03,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:03,045 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:03,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:03,245 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-07-09 17:16:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:03,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751094204] [2021-07-09 17:16:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:03,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751094204] [2021-07-09 17:16:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751094204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639942758] [2021-07-09 17:16:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:03,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:16:03,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:03,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639942758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:03,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:03,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:03,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416730137] [2021-07-09 17:16:03,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:03,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:03,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:03,377 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 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) [2021-07-09 17:16:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:03,554 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-07-09 17:16:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:03,555 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 21 [2021-07-09 17:16:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:03,575 INFO L225 Difference]: With dead ends: 10176 [2021-07-09 17:16:03,575 INFO L226 Difference]: Without dead ends: 10172 [2021-07-09 17:16:03,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-07-09 17:16:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-07-09 17:16:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-07-09 17:16:03,753 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-07-09 17:16:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:03,753 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-07-09 17:16:03,753 INFO L483 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) [2021-07-09 17:16:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-07-09 17:16:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:03,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:03,760 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:03,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-07-09 17:16:03,960 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-07-09 17:16:03,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:03,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765879497] [2021-07-09 17:16:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:04,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:04,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765879497] [2021-07-09 17:16:04,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765879497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:04,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439491894] [2021-07-09 17:16:04,022 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 [2021-07-09 17:16:04,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:16:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439491894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:04,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:04,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859582917] [2021-07-09 17:16:04,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:04,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:04,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:04,083 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 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) [2021-07-09 17:16:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:04,274 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-07-09 17:16:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:04,274 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 21 [2021-07-09 17:16:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:04,295 INFO L225 Difference]: With dead ends: 10153 [2021-07-09 17:16:04,295 INFO L226 Difference]: Without dead ends: 10148 [2021-07-09 17:16:04,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-07-09 17:16:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-07-09 17:16:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-07-09 17:16:04,465 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-07-09 17:16:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:04,465 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-07-09 17:16:04,465 INFO L483 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) [2021-07-09 17:16:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-07-09 17:16:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:04,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:04,472 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:04,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-07-09 17:16:04,672 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-07-09 17:16:04,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:04,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283302638] [2021-07-09 17:16:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:04,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:04,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283302638] [2021-07-09 17:16:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283302638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:04,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952290822] [2021-07-09 17:16:04,722 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 [2021-07-09 17:16:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952290822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:04,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:04,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:04,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737707560] [2021-07-09 17:16:04,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:04,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:04,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:04,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:04,782 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 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) [2021-07-09 17:16:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:04,882 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-07-09 17:16:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:04,882 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 21 [2021-07-09 17:16:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:04,942 INFO L225 Difference]: With dead ends: 10154 [2021-07-09 17:16:04,942 INFO L226 Difference]: Without dead ends: 10152 [2021-07-09 17:16:04,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-07-09 17:16:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-07-09 17:16:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-07-09 17:16:05,104 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-07-09 17:16:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:05,104 INFO L482 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-07-09 17:16:05,104 INFO L483 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) [2021-07-09 17:16:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-07-09 17:16:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:05,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:05,111 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:05,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3112,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:05,311 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-07-09 17:16:05,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:05,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493812514] [2021-07-09 17:16:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493812514] [2021-07-09 17:16:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493812514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400478142] [2021-07-09 17:16:05,362 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 [2021-07-09 17:16:05,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:05,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400478142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:05,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:05,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-09 17:16:05,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377480353] [2021-07-09 17:16:05,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:05,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:05,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:05,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:05,427 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:05,586 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-07-09 17:16:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:05,609 INFO L225 Difference]: With dead ends: 10120 [2021-07-09 17:16:05,609 INFO L226 Difference]: Without dead ends: 10120 [2021-07-09 17:16:05,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-07-09 17:16:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-07-09 17:16:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-07-09 17:16:05,788 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-07-09 17:16:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:05,788 INFO L482 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-07-09 17:16:05,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-07-09 17:16:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:05,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:05,795 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:05,996 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-07-09 17:16:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:05,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54696376] [2021-07-09 17:16:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:06,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:06,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54696376] [2021-07-09 17:16:06,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54696376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689108692] [2021-07-09 17:16:06,050 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 [2021-07-09 17:16:06,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:06,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:06,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689108692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:06,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132658605] [2021-07-09 17:16:06,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:06,108 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 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) [2021-07-09 17:16:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:06,278 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-07-09 17:16:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:06,278 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 21 [2021-07-09 17:16:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:06,300 INFO L225 Difference]: With dead ends: 10112 [2021-07-09 17:16:06,301 INFO L226 Difference]: Without dead ends: 10109 [2021-07-09 17:16:06,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-07-09 17:16:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-07-09 17:16:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-07-09 17:16:06,478 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-07-09 17:16:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-07-09 17:16:06,478 INFO L483 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) [2021-07-09 17:16:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-07-09 17:16:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:06,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:06,485 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:06,686 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-07-09 17:16:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:06,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271372334] [2021-07-09 17:16:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:06,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271372334] [2021-07-09 17:16:06,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271372334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646341557] [2021-07-09 17:16:06,752 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 [2021-07-09 17:16:06,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646341557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:06,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57689168] [2021-07-09 17:16:06,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:06,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:06,805 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 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) [2021-07-09 17:16:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:06,977 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-07-09 17:16:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:06,977 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 21 [2021-07-09 17:16:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:07,038 INFO L225 Difference]: With dead ends: 10108 [2021-07-09 17:16:07,038 INFO L226 Difference]: Without dead ends: 10105 [2021-07-09 17:16:07,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-07-09 17:16:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-07-09 17:16:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-07-09 17:16:07,182 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-07-09 17:16:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:07,182 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-07-09 17:16:07,182 INFO L483 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) [2021-07-09 17:16:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-07-09 17:16:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:07,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:07,188 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:07,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:07,389 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-07-09 17:16:07,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:07,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340530844] [2021-07-09 17:16:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:07,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340530844] [2021-07-09 17:16:07,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340530844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185842438] [2021-07-09 17:16:07,452 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 [2021-07-09 17:16:07,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:16:07,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185842438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770536018] [2021-07-09 17:16:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:07,518 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 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) [2021-07-09 17:16:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:07,684 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-07-09 17:16:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:07,684 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 21 [2021-07-09 17:16:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:07,705 INFO L225 Difference]: With dead ends: 10188 [2021-07-09 17:16:07,705 INFO L226 Difference]: Without dead ends: 10184 [2021-07-09 17:16:07,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-07-09 17:16:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-07-09 17:16:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-07-09 17:16:07,870 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-07-09 17:16:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:07,870 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-07-09 17:16:07,870 INFO L483 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) [2021-07-09 17:16:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-07-09 17:16:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:07,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:07,877 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:08,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:08,077 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:08,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-07-09 17:16:08,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:08,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374808437] [2021-07-09 17:16:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:08,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:08,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374808437] [2021-07-09 17:16:08,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374808437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558445734] [2021-07-09 17:16:08,144 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 [2021-07-09 17:16:08,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558445734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:08,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:16:08,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223046206] [2021-07-09 17:16:08,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:08,199 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 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) [2021-07-09 17:16:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:08,377 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-07-09 17:16:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:08,381 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 21 [2021-07-09 17:16:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:08,401 INFO L225 Difference]: With dead ends: 10178 [2021-07-09 17:16:08,401 INFO L226 Difference]: Without dead ends: 10173 [2021-07-09 17:16:08,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-07-09 17:16:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-07-09 17:16:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-07-09 17:16:08,564 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-07-09 17:16:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:08,564 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-07-09 17:16:08,564 INFO L483 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) [2021-07-09 17:16:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-07-09 17:16:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:08,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:08,570 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:08,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3117 [2021-07-09 17:16:08,770 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-07-09 17:16:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:08,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913556308] [2021-07-09 17:16:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:08,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:08,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913556308] [2021-07-09 17:16:08,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913556308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729467622] [2021-07-09 17:16:08,839 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 [2021-07-09 17:16:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:08,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729467622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:08,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:08,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102126944] [2021-07-09 17:16:08,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:08,891 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 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) [2021-07-09 17:16:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:09,091 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-07-09 17:16:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:09,091 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 21 [2021-07-09 17:16:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:09,107 INFO L225 Difference]: With dead ends: 10151 [2021-07-09 17:16:09,107 INFO L226 Difference]: Without dead ends: 10145 [2021-07-09 17:16:09,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-07-09 17:16:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-07-09 17:16:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-07-09 17:16:09,257 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-07-09 17:16:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:09,257 INFO L482 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-07-09 17:16:09,257 INFO L483 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) [2021-07-09 17:16:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-07-09 17:16:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:09,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:09,264 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:09,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:09,464 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-07-09 17:16:09,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:09,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259910921] [2021-07-09 17:16:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:09,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:09,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259910921] [2021-07-09 17:16:09,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259910921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:09,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263675855] [2021-07-09 17:16:09,509 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 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 [2021-07-09 17:16:09,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:09,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:09,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263675855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:09,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:09,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:09,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761534751] [2021-07-09 17:16:09,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:09,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:09,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:09,571 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 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) [2021-07-09 17:16:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:09,696 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-07-09 17:16:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:09,696 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 21 [2021-07-09 17:16:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:09,717 INFO L225 Difference]: With dead ends: 10106 [2021-07-09 17:16:09,717 INFO L226 Difference]: Without dead ends: 10106 [2021-07-09 17:16:09,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-07-09 17:16:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-07-09 17:16:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-07-09 17:16:09,880 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-07-09 17:16:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:09,880 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-07-09 17:16:09,880 INFO L483 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) [2021-07-09 17:16:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-07-09 17:16:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:09,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:09,887 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:10,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:10,087 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-07-09 17:16:10,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:10,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236795690] [2021-07-09 17:16:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:10,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236795690] [2021-07-09 17:16:10,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236795690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753661862] [2021-07-09 17:16:10,159 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 [2021-07-09 17:16:10,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:10,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753661862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:10,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081565363] [2021-07-09 17:16:10,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:10,216 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 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) [2021-07-09 17:16:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:10,352 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-07-09 17:16:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:10,352 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 21 [2021-07-09 17:16:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:10,371 INFO L225 Difference]: With dead ends: 10155 [2021-07-09 17:16:10,372 INFO L226 Difference]: Without dead ends: 10151 [2021-07-09 17:16:10,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:16:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-07-09 17:16:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-07-09 17:16:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-07-09 17:16:10,539 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-07-09 17:16:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:10,539 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-07-09 17:16:10,539 INFO L483 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) [2021-07-09 17:16:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-07-09 17:16:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:10,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:10,546 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:10,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-07-09 17:16:10,762 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-07-09 17:16:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:10,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876797256] [2021-07-09 17:16:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:10,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876797256] [2021-07-09 17:16:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876797256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718002270] [2021-07-09 17:16:10,817 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 [2021-07-09 17:16:10,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:10,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718002270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:10,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 17:16:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507273768] [2021-07-09 17:16:10,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:10,869 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 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) [2021-07-09 17:16:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:11,019 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-07-09 17:16:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:11,019 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 21 [2021-07-09 17:16:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:11,038 INFO L225 Difference]: With dead ends: 10215 [2021-07-09 17:16:11,038 INFO L226 Difference]: Without dead ends: 10211 [2021-07-09 17:16:11,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-07-09 17:16:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-07-09 17:16:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-07-09 17:16:11,221 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-07-09 17:16:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:11,221 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-07-09 17:16:11,221 INFO L483 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) [2021-07-09 17:16:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-07-09 17:16:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:11,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:11,227 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:11,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-07-09 17:16:11,428 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-07-09 17:16:11,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:11,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692202131] [2021-07-09 17:16:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:11,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692202131] [2021-07-09 17:16:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692202131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744048384] [2021-07-09 17:16:11,490 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 [2021-07-09 17:16:11,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:16:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:11,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744048384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:11,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:11,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:11,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562145142] [2021-07-09 17:16:11,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:11,560 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 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) [2021-07-09 17:16:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:11,735 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-07-09 17:16:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:11,736 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 21 [2021-07-09 17:16:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:11,758 INFO L225 Difference]: With dead ends: 10242 [2021-07-09 17:16:11,759 INFO L226 Difference]: Without dead ends: 10237 [2021-07-09 17:16:11,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-07-09 17:16:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-07-09 17:16:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-07-09 17:16:11,927 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-07-09 17:16:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:11,927 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-07-09 17:16:11,928 INFO L483 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) [2021-07-09 17:16:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-07-09 17:16:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:11,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:11,935 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:12,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-07-09 17:16:12,135 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-07-09 17:16:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719929229] [2021-07-09 17:16:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:12,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:12,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719929229] [2021-07-09 17:16:12,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719929229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276428963] [2021-07-09 17:16:12,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:12,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:12,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276428963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:12,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:16:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478762933] [2021-07-09 17:16:12,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:12,258 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 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) [2021-07-09 17:16:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:12,440 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-07-09 17:16:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:12,440 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 21 [2021-07-09 17:16:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:12,462 INFO L225 Difference]: With dead ends: 10254 [2021-07-09 17:16:12,462 INFO L226 Difference]: Without dead ends: 10250 [2021-07-09 17:16:12,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-07-09 17:16:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-07-09 17:16:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-07-09 17:16:12,646 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-07-09 17:16:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:12,647 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-07-09 17:16:12,647 INFO L483 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) [2021-07-09 17:16:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-07-09 17:16:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:12,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:12,654 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:12,865 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-07-09 17:16:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718538869] [2021-07-09 17:16:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:12,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718538869] [2021-07-09 17:16:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718538869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636297364] [2021-07-09 17:16:12,927 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:12,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636297364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:12,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:12,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122765319] [2021-07-09 17:16:12,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:12,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:12,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:12,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:12,979 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 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) [2021-07-09 17:16:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:13,157 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-07-09 17:16:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:13,157 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 21 [2021-07-09 17:16:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:13,217 INFO L225 Difference]: With dead ends: 10346 [2021-07-09 17:16:13,218 INFO L226 Difference]: Without dead ends: 10341 [2021-07-09 17:16:13,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-07-09 17:16:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-07-09 17:16:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-07-09 17:16:13,366 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-07-09 17:16:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:13,366 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-07-09 17:16:13,366 INFO L483 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) [2021-07-09 17:16:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-07-09 17:16:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:13,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:13,372 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:13,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:13,573 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-07-09 17:16:13,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:13,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457574021] [2021-07-09 17:16:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:13,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:13,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457574021] [2021-07-09 17:16:13,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457574021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:13,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120234540] [2021-07-09 17:16:13,639 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 [2021-07-09 17:16:13,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:13,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:13,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120234540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:13,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:13,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678677707] [2021-07-09 17:16:13,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:13,699 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 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) [2021-07-09 17:16:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:13,920 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-07-09 17:16:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:13,920 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 21 [2021-07-09 17:16:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:13,943 INFO L225 Difference]: With dead ends: 10320 [2021-07-09 17:16:13,943 INFO L226 Difference]: Without dead ends: 10314 [2021-07-09 17:16:13,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-07-09 17:16:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-07-09 17:16:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-07-09 17:16:14,119 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-07-09 17:16:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:14,120 INFO L482 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-07-09 17:16:14,120 INFO L483 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) [2021-07-09 17:16:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-07-09 17:16:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:14,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:14,126 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:14,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:14,327 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-07-09 17:16:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:14,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055843649] [2021-07-09 17:16:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:14,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:14,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055843649] [2021-07-09 17:16:14,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055843649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:14,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353949764] [2021-07-09 17:16:14,380 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 [2021-07-09 17:16:14,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:14,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353949764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:14,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:14,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582229973] [2021-07-09 17:16:14,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:14,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:14,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:14,442 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 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) [2021-07-09 17:16:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:14,544 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-07-09 17:16:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:14,544 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 21 [2021-07-09 17:16:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:14,564 INFO L225 Difference]: With dead ends: 10199 [2021-07-09 17:16:14,564 INFO L226 Difference]: Without dead ends: 10199 [2021-07-09 17:16:14,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-07-09 17:16:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-07-09 17:16:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-07-09 17:16:14,732 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-07-09 17:16:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:14,732 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-07-09 17:16:14,732 INFO L483 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) [2021-07-09 17:16:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-07-09 17:16:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:14,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:14,739 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:14,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:14,939 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-07-09 17:16:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:14,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799845282] [2021-07-09 17:16:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:14,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799845282] [2021-07-09 17:16:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799845282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593888835] [2021-07-09 17:16:14,987 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 [2021-07-09 17:16:15,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:15,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593888835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:15,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:15,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-09 17:16:15,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726800112] [2021-07-09 17:16:15,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:15,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:15,046 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:15,150 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-07-09 17:16:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:15,171 INFO L225 Difference]: With dead ends: 10191 [2021-07-09 17:16:15,171 INFO L226 Difference]: Without dead ends: 10191 [2021-07-09 17:16:15,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:16:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-07-09 17:16:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-07-09 17:16:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-07-09 17:16:15,361 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-07-09 17:16:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:15,361 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-07-09 17:16:15,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-07-09 17:16:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:15,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:15,368 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:15,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:15,568 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-07-09 17:16:15,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:15,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058758519] [2021-07-09 17:16:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:15,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:15,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058758519] [2021-07-09 17:16:15,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058758519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:15,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977518779] [2021-07-09 17:16:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:15,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:16:15,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977518779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 17:16:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031680828] [2021-07-09 17:16:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:15,677 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:15,842 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-07-09 17:16:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:15,862 INFO L225 Difference]: With dead ends: 10188 [2021-07-09 17:16:15,862 INFO L226 Difference]: Without dead ends: 10186 [2021-07-09 17:16:15,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-07-09 17:16:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-07-09 17:16:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-07-09 17:16:16,035 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-07-09 17:16:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:16,035 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-07-09 17:16:16,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-07-09 17:16:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:16,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:16,041 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:16,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:16,242 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-07-09 17:16:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294302896] [2021-07-09 17:16:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:16,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:16,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294302896] [2021-07-09 17:16:16,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294302896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:16,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500636593] [2021-07-09 17:16:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:16,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:16:16,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:16,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500636593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:16,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:16,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216600739] [2021-07-09 17:16:16,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:16,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:16,382 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 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) [2021-07-09 17:16:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:16,585 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-07-09 17:16:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:16,586 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 21 [2021-07-09 17:16:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:16,606 INFO L225 Difference]: With dead ends: 10193 [2021-07-09 17:16:16,607 INFO L226 Difference]: Without dead ends: 10190 [2021-07-09 17:16:16,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-07-09 17:16:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-07-09 17:16:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-07-09 17:16:16,784 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-07-09 17:16:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:16,785 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-07-09 17:16:16,785 INFO L483 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) [2021-07-09 17:16:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-07-09 17:16:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:16,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:16,791 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:16,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3129 [2021-07-09 17:16:16,992 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-07-09 17:16:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:16,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588167012] [2021-07-09 17:16:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:17,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588167012] [2021-07-09 17:16:17,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588167012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963016054] [2021-07-09 17:16:17,054 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 [2021-07-09 17:16:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:17,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963016054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:17,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:17,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211711069] [2021-07-09 17:16:17,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:17,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:17,113 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 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) [2021-07-09 17:16:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:17,344 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-07-09 17:16:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:17,345 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 21 [2021-07-09 17:16:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:17,364 INFO L225 Difference]: With dead ends: 10199 [2021-07-09 17:16:17,364 INFO L226 Difference]: Without dead ends: 10195 [2021-07-09 17:16:17,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-07-09 17:16:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-07-09 17:16:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-07-09 17:16:17,536 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-07-09 17:16:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:17,536 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-07-09 17:16:17,536 INFO L483 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) [2021-07-09 17:16:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-07-09 17:16:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:17,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:17,543 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:17,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-07-09 17:16:17,743 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-07-09 17:16:17,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:17,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006010008] [2021-07-09 17:16:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:17,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:17,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006010008] [2021-07-09 17:16:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006010008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481243696] [2021-07-09 17:16:17,808 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 [2021-07-09 17:16:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:17,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481243696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:17,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:17,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194729905] [2021-07-09 17:16:17,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:17,867 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 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) [2021-07-09 17:16:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:18,069 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-07-09 17:16:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:18,069 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 21 [2021-07-09 17:16:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:18,091 INFO L225 Difference]: With dead ends: 10440 [2021-07-09 17:16:18,091 INFO L226 Difference]: Without dead ends: 10435 [2021-07-09 17:16:18,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:16:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-07-09 17:16:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-07-09 17:16:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-07-09 17:16:18,273 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-07-09 17:16:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:18,273 INFO L482 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-07-09 17:16:18,273 INFO L483 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) [2021-07-09 17:16:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-07-09 17:16:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:18,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:18,280 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:18,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3131 [2021-07-09 17:16:18,496 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-07-09 17:16:18,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:18,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362130776] [2021-07-09 17:16:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:18,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:18,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362130776] [2021-07-09 17:16:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362130776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172855264] [2021-07-09 17:16:18,566 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 [2021-07-09 17:16:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:18,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172855264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:18,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:18,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319495285] [2021-07-09 17:16:18,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:18,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:18,629 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:18,843 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-07-09 17:16:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-07-09 17:16:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:18,866 INFO L225 Difference]: With dead ends: 10434 [2021-07-09 17:16:18,866 INFO L226 Difference]: Without dead ends: 10428 [2021-07-09 17:16:18,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:16:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-07-09 17:16:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-07-09 17:16:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-07-09 17:16:19,052 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-07-09 17:16:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:19,052 INFO L482 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-07-09 17:16:19,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-07-09 17:16:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:19,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:19,059 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:19,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-07-09 17:16:19,260 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-07-09 17:16:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:19,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175761487] [2021-07-09 17:16:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:19,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:19,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175761487] [2021-07-09 17:16:19,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175761487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:19,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850275100] [2021-07-09 17:16:19,333 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 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 [2021-07-09 17:16:19,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:19,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850275100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:19,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:19,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:19,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57378024] [2021-07-09 17:16:19,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:19,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:19,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:19,393 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 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) [2021-07-09 17:16:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:19,648 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-07-09 17:16:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:19,649 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 21 [2021-07-09 17:16:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:19,672 INFO L225 Difference]: With dead ends: 10403 [2021-07-09 17:16:19,672 INFO L226 Difference]: Without dead ends: 10396 [2021-07-09 17:16:19,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:16:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-07-09 17:16:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-07-09 17:16:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-07-09 17:16:19,859 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-07-09 17:16:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:19,859 INFO L482 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-07-09 17:16:19,860 INFO L483 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) [2021-07-09 17:16:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-07-09 17:16:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:19,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:19,867 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:20,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3133 [2021-07-09 17:16:20,067 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-07-09 17:16:20,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:20,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104469710] [2021-07-09 17:16:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:20,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104469710] [2021-07-09 17:16:20,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104469710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903727851] [2021-07-09 17:16:20,117 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 [2021-07-09 17:16:20,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:16:20,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:20,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:20,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903727851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:20,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-07-09 17:16:20,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092703146] [2021-07-09 17:16:20,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:20,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:20,190 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 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) [2021-07-09 17:16:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:20,335 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-07-09 17:16:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:20,336 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 21 [2021-07-09 17:16:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:20,358 INFO L225 Difference]: With dead ends: 10268 [2021-07-09 17:16:20,358 INFO L226 Difference]: Without dead ends: 10268 [2021-07-09 17:16:20,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-07-09 17:16:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-07-09 17:16:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-07-09 17:16:20,541 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-07-09 17:16:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:20,541 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-07-09 17:16:20,541 INFO L483 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) [2021-07-09 17:16:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-07-09 17:16:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:20,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:20,548 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:20,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:20,749 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-07-09 17:16:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:20,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624070307] [2021-07-09 17:16:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624070307] [2021-07-09 17:16:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624070307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777237730] [2021-07-09 17:16:20,807 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 [2021-07-09 17:16:20,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:16:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:20,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:20,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777237730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:20,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 17:16:20,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598824908] [2021-07-09 17:16:20,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:20,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:20,861 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 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) [2021-07-09 17:16:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:21,011 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-07-09 17:16:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:21,012 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 21 [2021-07-09 17:16:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:21,030 INFO L225 Difference]: With dead ends: 10257 [2021-07-09 17:16:21,030 INFO L226 Difference]: Without dead ends: 10252 [2021-07-09 17:16:21,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-07-09 17:16:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-07-09 17:16:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-07-09 17:16:21,183 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-07-09 17:16:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:21,183 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-07-09 17:16:21,183 INFO L483 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) [2021-07-09 17:16:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-07-09 17:16:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:21,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:21,190 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:21,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:21,390 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-07-09 17:16:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:21,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906629495] [2021-07-09 17:16:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906629495] [2021-07-09 17:16:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906629495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535230294] [2021-07-09 17:16:21,450 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 [2021-07-09 17:16:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:21,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535230294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:21,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:21,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:21,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395276995] [2021-07-09 17:16:21,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:21,502 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 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) [2021-07-09 17:16:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:21,699 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-07-09 17:16:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:21,700 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 21 [2021-07-09 17:16:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:21,719 INFO L225 Difference]: With dead ends: 10339 [2021-07-09 17:16:21,719 INFO L226 Difference]: Without dead ends: 10334 [2021-07-09 17:16:21,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-07-09 17:16:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-07-09 17:16:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-07-09 17:16:21,891 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-07-09 17:16:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-07-09 17:16:21,891 INFO L483 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) [2021-07-09 17:16:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-07-09 17:16:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:21,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:21,898 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:22,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3136 [2021-07-09 17:16:22,099 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-07-09 17:16:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:22,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118581609] [2021-07-09 17:16:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:22,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:22,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118581609] [2021-07-09 17:16:22,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118581609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350992274] [2021-07-09 17:16:22,175 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 [2021-07-09 17:16:22,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:22,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350992274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:22,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:22,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3334327] [2021-07-09 17:16:22,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:22,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:22,229 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 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) [2021-07-09 17:16:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:22,427 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-07-09 17:16:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:22,428 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 21 [2021-07-09 17:16:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:22,449 INFO L225 Difference]: With dead ends: 10400 [2021-07-09 17:16:22,449 INFO L226 Difference]: Without dead ends: 10394 [2021-07-09 17:16:22,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-07-09 17:16:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-07-09 17:16:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-07-09 17:16:22,619 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-07-09 17:16:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:22,619 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-07-09 17:16:22,619 INFO L483 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) [2021-07-09 17:16:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-07-09 17:16:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:22,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:22,626 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:22,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3137,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:22,827 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-07-09 17:16:22,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:22,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167144758] [2021-07-09 17:16:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:22,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:22,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167144758] [2021-07-09 17:16:22,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167144758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146406965] [2021-07-09 17:16:22,893 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 [2021-07-09 17:16:22,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:16:22,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:22,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:22,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146406965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:22,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862297817] [2021-07-09 17:16:22,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:22,965 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:23,154 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-07-09 17:16:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-07-09 17:16:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:23,175 INFO L225 Difference]: With dead ends: 10336 [2021-07-09 17:16:23,176 INFO L226 Difference]: Without dead ends: 10331 [2021-07-09 17:16:23,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-07-09 17:16:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-07-09 17:16:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-07-09 17:16:23,363 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-07-09 17:16:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:23,363 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-07-09 17:16:23,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-07-09 17:16:23,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:23,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:23,370 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:23,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3138 [2021-07-09 17:16:23,570 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-07-09 17:16:23,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:23,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858030999] [2021-07-09 17:16:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:23,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858030999] [2021-07-09 17:16:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858030999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194297575] [2021-07-09 17:16:23,685 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 [2021-07-09 17:16:23,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194297575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:23,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:23,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:23,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904016432] [2021-07-09 17:16:23,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:23,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:23,757 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 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) [2021-07-09 17:16:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:24,027 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-07-09 17:16:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:24,027 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 21 [2021-07-09 17:16:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:24,049 INFO L225 Difference]: With dead ends: 10532 [2021-07-09 17:16:24,049 INFO L226 Difference]: Without dead ends: 10526 [2021-07-09 17:16:24,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:16:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-07-09 17:16:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-07-09 17:16:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-07-09 17:16:24,233 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-07-09 17:16:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:24,233 INFO L482 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-07-09 17:16:24,233 INFO L483 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) [2021-07-09 17:16:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-07-09 17:16:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:24,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:24,240 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3139,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:24,441 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-07-09 17:16:24,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:24,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828599702] [2021-07-09 17:16:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:24,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:24,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828599702] [2021-07-09 17:16:24,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828599702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:24,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453155979] [2021-07-09 17:16:24,511 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 [2021-07-09 17:16:24,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:16:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:24,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453155979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:24,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:24,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:24,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897037266] [2021-07-09 17:16:24,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:24,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:24,573 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 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) [2021-07-09 17:16:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:24,785 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-07-09 17:16:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:24,786 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 21 [2021-07-09 17:16:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:24,807 INFO L225 Difference]: With dead ends: 10492 [2021-07-09 17:16:24,807 INFO L226 Difference]: Without dead ends: 10485 [2021-07-09 17:16:24,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:16:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-07-09 17:16:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-07-09 17:16:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-07-09 17:16:24,990 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-07-09 17:16:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:24,990 INFO L482 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-07-09 17:16:24,990 INFO L483 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) [2021-07-09 17:16:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-07-09 17:16:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:24,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:24,997 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:25,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3140,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:25,197 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-07-09 17:16:25,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:25,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250110626] [2021-07-09 17:16:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:25,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250110626] [2021-07-09 17:16:25,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250110626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140970050] [2021-07-09 17:16:25,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:25,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:25,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:25,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140970050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:25,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:25,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980314809] [2021-07-09 17:16:25,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:25,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:25,306 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 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) [2021-07-09 17:16:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:25,397 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-07-09 17:16:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:25,397 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 21 [2021-07-09 17:16:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:25,419 INFO L225 Difference]: With dead ends: 10308 [2021-07-09 17:16:25,419 INFO L226 Difference]: Without dead ends: 10308 [2021-07-09 17:16:25,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-07-09 17:16:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-07-09 17:16:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-07-09 17:16:25,640 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-07-09 17:16:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:25,640 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-07-09 17:16:25,640 INFO L483 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) [2021-07-09 17:16:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-07-09 17:16:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:25,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:25,647 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:25,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-07-09 17:16:25,848 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-07-09 17:16:25,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:25,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068426150] [2021-07-09 17:16:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:25,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068426150] [2021-07-09 17:16:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068426150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997148929] [2021-07-09 17:16:25,896 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 [2021-07-09 17:16:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:25,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997148929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:25,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:25,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-09 17:16:25,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585683343] [2021-07-09 17:16:25,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:25,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:25,954 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:26,049 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-07-09 17:16:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:26,067 INFO L225 Difference]: With dead ends: 10304 [2021-07-09 17:16:26,067 INFO L226 Difference]: Without dead ends: 10304 [2021-07-09 17:16:26,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-07-09 17:16:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-07-09 17:16:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-07-09 17:16:26,225 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-07-09 17:16:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-07-09 17:16:26,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-07-09 17:16:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:26,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:26,232 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:26,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:26,433 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-07-09 17:16:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:26,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535616855] [2021-07-09 17:16:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:26,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:26,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535616855] [2021-07-09 17:16:26,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535616855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:26,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059110640] [2021-07-09 17:16:26,486 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 [2021-07-09 17:16:26,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059110640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:26,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:26,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 17:16:26,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383639300] [2021-07-09 17:16:26,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:26,538 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:26,694 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-07-09 17:16:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:26,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:26,712 INFO L225 Difference]: With dead ends: 10301 [2021-07-09 17:16:26,712 INFO L226 Difference]: Without dead ends: 10299 [2021-07-09 17:16:26,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-07-09 17:16:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-07-09 17:16:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-07-09 17:16:26,869 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-07-09 17:16:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:26,869 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-07-09 17:16:26,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-07-09 17:16:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:26,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:26,876 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:27,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-07-09 17:16:27,081 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-07-09 17:16:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:27,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682342571] [2021-07-09 17:16:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:27,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682342571] [2021-07-09 17:16:27,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682342571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134024111] [2021-07-09 17:16:27,134 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 [2021-07-09 17:16:27,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:27,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:27,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134024111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:27,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:27,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178183694] [2021-07-09 17:16:27,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:27,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:27,197 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 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) [2021-07-09 17:16:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:27,374 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-07-09 17:16:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:27,375 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 21 [2021-07-09 17:16:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:27,393 INFO L225 Difference]: With dead ends: 10306 [2021-07-09 17:16:27,393 INFO L226 Difference]: Without dead ends: 10303 [2021-07-09 17:16:27,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-07-09 17:16:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-07-09 17:16:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-07-09 17:16:27,584 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-07-09 17:16:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:27,584 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-07-09 17:16:27,584 INFO L483 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) [2021-07-09 17:16:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-07-09 17:16:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:27,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:27,591 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:27,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-07-09 17:16:27,791 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-07-09 17:16:27,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:27,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659209042] [2021-07-09 17:16:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:27,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:27,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659209042] [2021-07-09 17:16:27,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659209042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155404066] [2021-07-09 17:16:27,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:27,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:27,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:27,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155404066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:27,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:27,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823974331] [2021-07-09 17:16:27,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:27,906 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 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) [2021-07-09 17:16:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:28,065 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-07-09 17:16:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:28,065 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 21 [2021-07-09 17:16:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:28,087 INFO L225 Difference]: With dead ends: 11212 [2021-07-09 17:16:28,088 INFO L226 Difference]: Without dead ends: 11208 [2021-07-09 17:16:28,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-07-09 17:16:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-07-09 17:16:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-07-09 17:16:28,267 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-07-09 17:16:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:28,267 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-07-09 17:16:28,267 INFO L483 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) [2021-07-09 17:16:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-07-09 17:16:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:28,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:28,274 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:28,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3145,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:28,474 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-07-09 17:16:28,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:28,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293717458] [2021-07-09 17:16:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:28,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293717458] [2021-07-09 17:16:28,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293717458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900320726] [2021-07-09 17:16:28,558 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) [2021-07-09 17:16:28,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:16:28,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:28,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900320726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:28,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:28,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597841419] [2021-07-09 17:16:28,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:28,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:28,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:28,618 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 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) [2021-07-09 17:16:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:28,788 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-07-09 17:16:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:28,788 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 21 [2021-07-09 17:16:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:28,815 INFO L225 Difference]: With dead ends: 11223 [2021-07-09 17:16:28,815 INFO L226 Difference]: Without dead ends: 11218 [2021-07-09 17:16:28,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-07-09 17:16:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-07-09 17:16:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-07-09 17:16:29,001 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-07-09 17:16:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:29,001 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-07-09 17:16:29,001 INFO L483 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) [2021-07-09 17:16:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-07-09 17:16:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:29,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:29,008 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:29,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:29,208 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-07-09 17:16:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664441776] [2021-07-09 17:16:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:29,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:29,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664441776] [2021-07-09 17:16:29,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664441776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:29,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629916998] [2021-07-09 17:16:29,275 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 [2021-07-09 17:16:29,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:16:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629916998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:29,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:29,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138599914] [2021-07-09 17:16:29,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:29,334 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 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) [2021-07-09 17:16:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:29,480 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-07-09 17:16:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:29,480 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 21 [2021-07-09 17:16:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:29,502 INFO L225 Difference]: With dead ends: 10405 [2021-07-09 17:16:29,502 INFO L226 Difference]: Without dead ends: 10400 [2021-07-09 17:16:29,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-07-09 17:16:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-07-09 17:16:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-07-09 17:16:29,703 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-07-09 17:16:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:29,703 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-07-09 17:16:29,703 INFO L483 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) [2021-07-09 17:16:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-07-09 17:16:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:29,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:29,710 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:29,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3147,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:29,910 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-07-09 17:16:29,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:29,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595256748] [2021-07-09 17:16:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:29,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:29,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595256748] [2021-07-09 17:16:29,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595256748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:29,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641217916] [2021-07-09 17:16:29,979 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 [2021-07-09 17:16:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:30,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:30,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641217916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:30,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:30,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:30,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771101752] [2021-07-09 17:16:30,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:30,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:30,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:30,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:30,040 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 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) [2021-07-09 17:16:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:30,200 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-07-09 17:16:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:30,200 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 21 [2021-07-09 17:16:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:30,221 INFO L225 Difference]: With dead ends: 10382 [2021-07-09 17:16:30,221 INFO L226 Difference]: Without dead ends: 10376 [2021-07-09 17:16:30,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-07-09 17:16:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-07-09 17:16:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-07-09 17:16:30,391 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-07-09 17:16:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:30,391 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-07-09 17:16:30,391 INFO L483 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) [2021-07-09 17:16:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-07-09 17:16:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:30,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:30,398 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:30,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3148 [2021-07-09 17:16:30,599 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-07-09 17:16:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256729763] [2021-07-09 17:16:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:30,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256729763] [2021-07-09 17:16:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256729763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625118150] [2021-07-09 17:16:30,672 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 [2021-07-09 17:16:30,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:30,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:30,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625118150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:30,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:30,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:30,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436465021] [2021-07-09 17:16:30,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:30,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:30,748 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 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) [2021-07-09 17:16:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:30,890 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-07-09 17:16:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:16:30,891 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 21 [2021-07-09 17:16:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:30,908 INFO L225 Difference]: With dead ends: 10354 [2021-07-09 17:16:30,909 INFO L226 Difference]: Without dead ends: 10347 [2021-07-09 17:16:30,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-07-09 17:16:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-07-09 17:16:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-07-09 17:16:31,060 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-07-09 17:16:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:31,061 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-07-09 17:16:31,061 INFO L483 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) [2021-07-09 17:16:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-07-09 17:16:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:31,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:31,067 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:31,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:31,268 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:31,268 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-07-09 17:16:31,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:31,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577443725] [2021-07-09 17:16:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:31,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577443725] [2021-07-09 17:16:31,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577443725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433478657] [2021-07-09 17:16:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:31,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:31,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:31,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433478657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:31,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:31,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:31,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44926646] [2021-07-09 17:16:31,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:31,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:31,381 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 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) [2021-07-09 17:16:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:31,507 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-07-09 17:16:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:31,508 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 21 [2021-07-09 17:16:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:31,527 INFO L225 Difference]: With dead ends: 10360 [2021-07-09 17:16:31,527 INFO L226 Difference]: Without dead ends: 10360 [2021-07-09 17:16:31,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:16:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-07-09 17:16:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-07-09 17:16:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-07-09 17:16:31,719 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-07-09 17:16:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:31,719 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-07-09 17:16:31,719 INFO L483 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) [2021-07-09 17:16:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-07-09 17:16:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:31,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:31,726 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:31,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-07-09 17:16:31,927 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-07-09 17:16:31,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:31,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854951924] [2021-07-09 17:16:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:32,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854951924] [2021-07-09 17:16:32,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854951924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500535919] [2021-07-09 17:16:32,006 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 [2021-07-09 17:16:32,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500535919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:16:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415831584] [2021-07-09 17:16:32,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:32,058 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 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) [2021-07-09 17:16:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:32,221 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-07-09 17:16:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:32,222 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 21 [2021-07-09 17:16:32,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:32,241 INFO L225 Difference]: With dead ends: 10425 [2021-07-09 17:16:32,241 INFO L226 Difference]: Without dead ends: 10419 [2021-07-09 17:16:32,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-07-09 17:16:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-07-09 17:16:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-07-09 17:16:32,409 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-07-09 17:16:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:32,409 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-07-09 17:16:32,409 INFO L483 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) [2021-07-09 17:16:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-07-09 17:16:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:32,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:32,416 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:32,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-07-09 17:16:32,616 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:32,616 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-07-09 17:16:32,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:32,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956763969] [2021-07-09 17:16:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:32,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956763969] [2021-07-09 17:16:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956763969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385750713] [2021-07-09 17:16:32,681 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 [2021-07-09 17:16:32,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:16:32,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:32,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:32,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:32,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385750713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:32,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:32,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501828533] [2021-07-09 17:16:32,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:32,743 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:32,921 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-07-09 17:16:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-07-09 17:16:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:32,942 INFO L225 Difference]: With dead ends: 10525 [2021-07-09 17:16:32,942 INFO L226 Difference]: Without dead ends: 10519 [2021-07-09 17:16:32,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-07-09 17:16:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-07-09 17:16:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-07-09 17:16:33,123 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-07-09 17:16:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:33,124 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-07-09 17:16:33,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-07-09 17:16:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:33,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:33,131 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:33,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3152,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:33,331 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-07-09 17:16:33,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:33,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454646131] [2021-07-09 17:16:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454646131] [2021-07-09 17:16:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454646131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574449108] [2021-07-09 17:16:33,405 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 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 [2021-07-09 17:16:33,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:16:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574449108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:33,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:33,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:33,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950542391] [2021-07-09 17:16:33,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:33,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:33,472 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 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) [2021-07-09 17:16:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:33,741 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-07-09 17:16:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:16:33,741 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 21 [2021-07-09 17:16:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:33,761 INFO L225 Difference]: With dead ends: 10675 [2021-07-09 17:16:33,762 INFO L226 Difference]: Without dead ends: 10668 [2021-07-09 17:16:33,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:16:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-07-09 17:16:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-07-09 17:16:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-07-09 17:16:33,938 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-07-09 17:16:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:33,938 INFO L482 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-07-09 17:16:33,938 INFO L483 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) [2021-07-09 17:16:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-07-09 17:16:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:33,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:33,945 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:34,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-07-09 17:16:34,146 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-07-09 17:16:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805065775] [2021-07-09 17:16:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:34,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:34,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805065775] [2021-07-09 17:16:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805065775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183800157] [2021-07-09 17:16:34,210 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 [2021-07-09 17:16:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:34,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183800157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:34,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:34,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604220187] [2021-07-09 17:16:34,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:34,270 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 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) [2021-07-09 17:16:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:34,441 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-07-09 17:16:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:34,442 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 21 [2021-07-09 17:16:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:34,462 INFO L225 Difference]: With dead ends: 10950 [2021-07-09 17:16:34,462 INFO L226 Difference]: Without dead ends: 10944 [2021-07-09 17:16:34,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-07-09 17:16:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-07-09 17:16:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-07-09 17:16:34,632 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-07-09 17:16:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:34,632 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-07-09 17:16:34,632 INFO L483 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) [2021-07-09 17:16:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-07-09 17:16:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:34,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:34,639 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:34,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-07-09 17:16:34,839 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-07-09 17:16:34,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:34,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038668038] [2021-07-09 17:16:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:34,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038668038] [2021-07-09 17:16:34,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038668038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235407337] [2021-07-09 17:16:34,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:34,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:34,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235407337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:34,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327942973] [2021-07-09 17:16:34,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:34,972 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 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) [2021-07-09 17:16:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:35,137 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-07-09 17:16:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:35,138 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 21 [2021-07-09 17:16:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:35,159 INFO L225 Difference]: With dead ends: 10448 [2021-07-09 17:16:35,159 INFO L226 Difference]: Without dead ends: 10442 [2021-07-09 17:16:35,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-07-09 17:16:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-07-09 17:16:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-07-09 17:16:35,330 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-07-09 17:16:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-07-09 17:16:35,330 INFO L483 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) [2021-07-09 17:16:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-07-09 17:16:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:35,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:35,337 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:35,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-07-09 17:16:35,538 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-07-09 17:16:35,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:35,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605507442] [2021-07-09 17:16:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:35,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605507442] [2021-07-09 17:16:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605507442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371036377] [2021-07-09 17:16:35,628 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 [2021-07-09 17:16:35,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:16:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371036377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:35,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:35,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:35,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71344181] [2021-07-09 17:16:35,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:35,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:35,692 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:35,878 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-07-09 17:16:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-07-09 17:16:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:35,899 INFO L225 Difference]: With dead ends: 10417 [2021-07-09 17:16:35,899 INFO L226 Difference]: Without dead ends: 10410 [2021-07-09 17:16:35,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-07-09 17:16:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-07-09 17:16:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-07-09 17:16:36,076 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-07-09 17:16:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:36,076 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-07-09 17:16:36,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-07-09 17:16:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:36,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:36,084 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:36,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:36,284 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-07-09 17:16:36,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:36,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229663482] [2021-07-09 17:16:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:36,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:36,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229663482] [2021-07-09 17:16:36,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229663482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:36,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900715994] [2021-07-09 17:16:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:36,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:36,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:36,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:36,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900715994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:36,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:36,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:36,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354909211] [2021-07-09 17:16:36,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:36,410 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 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) [2021-07-09 17:16:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:36,506 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-07-09 17:16:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:36,506 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 21 [2021-07-09 17:16:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:36,526 INFO L225 Difference]: With dead ends: 10562 [2021-07-09 17:16:36,526 INFO L226 Difference]: Without dead ends: 10562 [2021-07-09 17:16:36,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-07-09 17:16:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-07-09 17:16:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-07-09 17:16:36,711 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-07-09 17:16:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:36,711 INFO L482 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-07-09 17:16:36,711 INFO L483 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) [2021-07-09 17:16:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-07-09 17:16:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:36,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:36,718 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:36,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:36,919 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-07-09 17:16:36,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:36,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669560475] [2021-07-09 17:16:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:36,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:36,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669560475] [2021-07-09 17:16:36,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669560475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:36,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334358050] [2021-07-09 17:16:36,969 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 [2021-07-09 17:16:36,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:16:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:37,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334358050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:37,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:37,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-09 17:16:37,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268661677] [2021-07-09 17:16:37,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:37,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:37,047 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:37,154 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-07-09 17:16:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:16:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:37,176 INFO L225 Difference]: With dead ends: 10501 [2021-07-09 17:16:37,176 INFO L226 Difference]: Without dead ends: 10501 [2021-07-09 17:16:37,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-07-09 17:16:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-07-09 17:16:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-07-09 17:16:37,367 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-07-09 17:16:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:37,367 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-07-09 17:16:37,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-07-09 17:16:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:37,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:37,375 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:37,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:37,575 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-07-09 17:16:37,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:37,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091099637] [2021-07-09 17:16:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:37,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:37,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091099637] [2021-07-09 17:16:37,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091099637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:37,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754378239] [2021-07-09 17:16:37,630 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 [2021-07-09 17:16:37,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:37,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:37,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754378239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:37,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:37,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380544630] [2021-07-09 17:16:37,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:37,686 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 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) [2021-07-09 17:16:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:37,863 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-07-09 17:16:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:37,864 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 21 [2021-07-09 17:16:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:37,882 INFO L225 Difference]: With dead ends: 10497 [2021-07-09 17:16:37,882 INFO L226 Difference]: Without dead ends: 10495 [2021-07-09 17:16:37,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-07-09 17:16:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-07-09 17:16:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-07-09 17:16:38,052 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-07-09 17:16:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:38,052 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-07-09 17:16:38,052 INFO L483 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) [2021-07-09 17:16:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-07-09 17:16:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:38,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:38,059 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:38,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3159,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:38,259 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-07-09 17:16:38,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:38,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090447930] [2021-07-09 17:16:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:38,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090447930] [2021-07-09 17:16:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090447930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801843533] [2021-07-09 17:16:38,315 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 [2021-07-09 17:16:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801843533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:38,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:38,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951043758] [2021-07-09 17:16:38,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:38,374 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 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) [2021-07-09 17:16:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:38,550 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-07-09 17:16:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:38,551 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 21 [2021-07-09 17:16:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:38,571 INFO L225 Difference]: With dead ends: 10502 [2021-07-09 17:16:38,571 INFO L226 Difference]: Without dead ends: 10499 [2021-07-09 17:16:38,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-07-09 17:16:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-07-09 17:16:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-07-09 17:16:38,748 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-07-09 17:16:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:38,748 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-07-09 17:16:38,748 INFO L483 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) [2021-07-09 17:16:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-07-09 17:16:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:38,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:38,755 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:38,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-07-09 17:16:38,956 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-07-09 17:16:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:38,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129326731] [2021-07-09 17:16:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:39,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129326731] [2021-07-09 17:16:39,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129326731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512729057] [2021-07-09 17:16:39,028 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 [2021-07-09 17:16:39,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512729057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:39,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:39,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179045999] [2021-07-09 17:16:39,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:39,088 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 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) [2021-07-09 17:16:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:39,248 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-07-09 17:16:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:39,249 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 21 [2021-07-09 17:16:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:39,274 INFO L225 Difference]: With dead ends: 11892 [2021-07-09 17:16:39,274 INFO L226 Difference]: Without dead ends: 11888 [2021-07-09 17:16:39,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-07-09 17:16:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-07-09 17:16:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-07-09 17:16:39,469 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-07-09 17:16:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:39,469 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-07-09 17:16:39,469 INFO L483 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) [2021-07-09 17:16:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-07-09 17:16:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:39,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:39,476 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:39,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3161,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:39,676 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-07-09 17:16:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:39,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251549891] [2021-07-09 17:16:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:39,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251549891] [2021-07-09 17:16:39,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251549891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345463824] [2021-07-09 17:16:39,790 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 [2021-07-09 17:16:39,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:16:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:39,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345463824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:39,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:39,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:39,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396500221] [2021-07-09 17:16:39,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:39,853 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 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) [2021-07-09 17:16:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:40,009 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-07-09 17:16:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:40,009 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 21 [2021-07-09 17:16:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:40,033 INFO L225 Difference]: With dead ends: 11434 [2021-07-09 17:16:40,033 INFO L226 Difference]: Without dead ends: 11429 [2021-07-09 17:16:40,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-07-09 17:16:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-07-09 17:16:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-07-09 17:16:40,223 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-07-09 17:16:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:40,223 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-07-09 17:16:40,223 INFO L483 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) [2021-07-09 17:16:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-07-09 17:16:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:40,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:40,231 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:40,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3162 [2021-07-09 17:16:40,432 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-07-09 17:16:40,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:40,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878534159] [2021-07-09 17:16:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:40,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:40,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878534159] [2021-07-09 17:16:40,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878534159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:40,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110686152] [2021-07-09 17:16:40,498 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 [2021-07-09 17:16:40,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110686152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:40,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844563709] [2021-07-09 17:16:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:40,556 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 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) [2021-07-09 17:16:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:40,750 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-07-09 17:16:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:40,750 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 21 [2021-07-09 17:16:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:40,777 INFO L225 Difference]: With dead ends: 11458 [2021-07-09 17:16:40,777 INFO L226 Difference]: Without dead ends: 11452 [2021-07-09 17:16:40,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-07-09 17:16:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-07-09 17:16:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-07-09 17:16:40,974 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-07-09 17:16:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:40,974 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-07-09 17:16:40,974 INFO L483 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) [2021-07-09 17:16:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-07-09 17:16:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:40,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:40,981 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:41,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-07-09 17:16:41,182 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-07-09 17:16:41,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:41,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773427238] [2021-07-09 17:16:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:41,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773427238] [2021-07-09 17:16:41,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773427238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777224828] [2021-07-09 17:16:41,258 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 [2021-07-09 17:16:41,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:16:41,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:41,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777224828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:41,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:41,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547366103] [2021-07-09 17:16:41,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:41,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:41,318 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 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) [2021-07-09 17:16:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:41,477 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-07-09 17:16:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:41,477 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 21 [2021-07-09 17:16:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:41,498 INFO L225 Difference]: With dead ends: 10600 [2021-07-09 17:16:41,499 INFO L226 Difference]: Without dead ends: 10594 [2021-07-09 17:16:41,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-07-09 17:16:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-07-09 17:16:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-07-09 17:16:41,705 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-07-09 17:16:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:41,706 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-07-09 17:16:41,706 INFO L483 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) [2021-07-09 17:16:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-07-09 17:16:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:41,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:41,713 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:41,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3164,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:41,913 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-07-09 17:16:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:41,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076093155] [2021-07-09 17:16:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:41,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076093155] [2021-07-09 17:16:41,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076093155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568269320] [2021-07-09 17:16:41,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:42,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:42,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:42,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:42,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:42,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568269320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:42,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:42,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404545065] [2021-07-09 17:16:42,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:42,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:42,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:42,049 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:42,216 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-07-09 17:16:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-07-09 17:16:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:42,239 INFO L225 Difference]: With dead ends: 10577 [2021-07-09 17:16:42,239 INFO L226 Difference]: Without dead ends: 10570 [2021-07-09 17:16:42,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-07-09 17:16:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-07-09 17:16:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-07-09 17:16:42,429 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-07-09 17:16:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:42,430 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-07-09 17:16:42,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-07-09 17:16:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-07-09 17:16:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:42,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:42,437 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:42,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-07-09 17:16:42,638 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-07-09 17:16:42,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931057265] [2021-07-09 17:16:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:42,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:42,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931057265] [2021-07-09 17:16:42,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931057265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:42,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219998644] [2021-07-09 17:16:42,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:42,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219998644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:42,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:42,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178778997] [2021-07-09 17:16:42,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:42,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:42,778 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 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) [2021-07-09 17:16:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:42,933 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-07-09 17:16:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:16:42,933 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 21 [2021-07-09 17:16:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:42,953 INFO L225 Difference]: With dead ends: 10543 [2021-07-09 17:16:42,953 INFO L226 Difference]: Without dead ends: 10535 [2021-07-09 17:16:42,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-07-09 17:16:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-07-09 17:16:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-07-09 17:16:43,116 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-07-09 17:16:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:43,116 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-07-09 17:16:43,117 INFO L483 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) [2021-07-09 17:16:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-07-09 17:16:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:43,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:43,124 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:43,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3166,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:43,324 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-07-09 17:16:43,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573871621] [2021-07-09 17:16:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573871621] [2021-07-09 17:16:43,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573871621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115795667] [2021-07-09 17:16:43,388 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 [2021-07-09 17:16:43,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115795667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:43,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:43,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:16:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998697043] [2021-07-09 17:16:43,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:43,452 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 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) [2021-07-09 17:16:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:43,595 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-07-09 17:16:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:16:43,595 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 21 [2021-07-09 17:16:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:43,616 INFO L225 Difference]: With dead ends: 10708 [2021-07-09 17:16:43,616 INFO L226 Difference]: Without dead ends: 10708 [2021-07-09 17:16:43,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:16:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-07-09 17:16:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-07-09 17:16:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-07-09 17:16:43,827 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-07-09 17:16:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:43,827 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-07-09 17:16:43,827 INFO L483 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) [2021-07-09 17:16:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-07-09 17:16:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:43,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:43,834 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:44,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3167,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:44,035 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-07-09 17:16:44,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:44,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714136337] [2021-07-09 17:16:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:44,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714136337] [2021-07-09 17:16:44,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714136337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956355370] [2021-07-09 17:16:44,097 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 [2021-07-09 17:16:44,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:16:44,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956355370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125850418] [2021-07-09 17:16:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:44,162 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 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) [2021-07-09 17:16:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:44,342 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-07-09 17:16:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:44,342 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 21 [2021-07-09 17:16:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:44,364 INFO L225 Difference]: With dead ends: 10785 [2021-07-09 17:16:44,364 INFO L226 Difference]: Without dead ends: 10778 [2021-07-09 17:16:44,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-07-09 17:16:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-07-09 17:16:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-07-09 17:16:44,553 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-07-09 17:16:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:44,553 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-07-09 17:16:44,553 INFO L483 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) [2021-07-09 17:16:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-07-09 17:16:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:44,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:44,561 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:44,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:44,761 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-07-09 17:16:44,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:44,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146646983] [2021-07-09 17:16:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:44,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146646983] [2021-07-09 17:16:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146646983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328825365] [2021-07-09 17:16:44,824 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 [2021-07-09 17:16:44,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328825365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:44,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708672309] [2021-07-09 17:16:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:44,885 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 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) [2021-07-09 17:16:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:45,073 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-07-09 17:16:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:45,073 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 21 [2021-07-09 17:16:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:45,096 INFO L225 Difference]: With dead ends: 11060 [2021-07-09 17:16:45,097 INFO L226 Difference]: Without dead ends: 11053 [2021-07-09 17:16:45,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-07-09 17:16:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-07-09 17:16:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-07-09 17:16:45,289 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-07-09 17:16:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:45,289 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-07-09 17:16:45,289 INFO L483 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) [2021-07-09 17:16:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-07-09 17:16:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:45,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:45,297 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:45,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:45,498 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:45,498 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-07-09 17:16:45,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:45,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148063387] [2021-07-09 17:16:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:45,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148063387] [2021-07-09 17:16:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148063387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982904825] [2021-07-09 17:16:45,563 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 [2021-07-09 17:16:45,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:16:45,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982904825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:45,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:45,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75724880] [2021-07-09 17:16:45,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:45,623 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 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) [2021-07-09 17:16:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:45,822 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-07-09 17:16:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:45,823 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 21 [2021-07-09 17:16:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:45,843 INFO L225 Difference]: With dead ends: 10685 [2021-07-09 17:16:45,844 INFO L226 Difference]: Without dead ends: 10678 [2021-07-09 17:16:45,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-07-09 17:16:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-07-09 17:16:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-07-09 17:16:46,020 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-07-09 17:16:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-07-09 17:16:46,020 INFO L483 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) [2021-07-09 17:16:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-07-09 17:16:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:46,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:46,028 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:46,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3170 [2021-07-09 17:16:46,228 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-07-09 17:16:46,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:46,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433212240] [2021-07-09 17:16:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:46,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:46,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433212240] [2021-07-09 17:16:46,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433212240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:46,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104489242] [2021-07-09 17:16:46,289 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 [2021-07-09 17:16:46,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:16:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104489242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635857261] [2021-07-09 17:16:46,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:46,351 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 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) [2021-07-09 17:16:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:46,536 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-07-09 17:16:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:46,537 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 21 [2021-07-09 17:16:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:46,558 INFO L225 Difference]: With dead ends: 11317 [2021-07-09 17:16:46,558 INFO L226 Difference]: Without dead ends: 11310 [2021-07-09 17:16:46,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-07-09 17:16:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-07-09 17:16:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-07-09 17:16:46,737 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-07-09 17:16:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:46,737 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-07-09 17:16:46,737 INFO L483 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) [2021-07-09 17:16:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-07-09 17:16:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:46,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:46,744 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:46,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:46,945 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-07-09 17:16:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:46,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224144952] [2021-07-09 17:16:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224144952] [2021-07-09 17:16:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224144952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783733034] [2021-07-09 17:16:47,009 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 [2021-07-09 17:16:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:47,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783733034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:47,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:47,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126425344] [2021-07-09 17:16:47,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:47,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:47,068 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 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) [2021-07-09 17:16:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:47,236 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-07-09 17:16:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:47,236 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 21 [2021-07-09 17:16:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:47,258 INFO L225 Difference]: With dead ends: 10745 [2021-07-09 17:16:47,259 INFO L226 Difference]: Without dead ends: 10738 [2021-07-09 17:16:47,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-07-09 17:16:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-07-09 17:16:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-07-09 17:16:47,436 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-07-09 17:16:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:47,436 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-07-09 17:16:47,436 INFO L483 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) [2021-07-09 17:16:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-07-09 17:16:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:47,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:47,443 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:47,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3172 [2021-07-09 17:16:47,644 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-07-09 17:16:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367022535] [2021-07-09 17:16:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:47,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367022535] [2021-07-09 17:16:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367022535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489518725] [2021-07-09 17:16:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:47,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:47,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489518725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:47,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:47,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15641909] [2021-07-09 17:16:47,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:47,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:47,836 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 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) [2021-07-09 17:16:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:47,994 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-07-09 17:16:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:47,995 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 21 [2021-07-09 17:16:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:48,016 INFO L225 Difference]: With dead ends: 10713 [2021-07-09 17:16:48,016 INFO L226 Difference]: Without dead ends: 10705 [2021-07-09 17:16:48,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-07-09 17:16:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-07-09 17:16:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-07-09 17:16:48,195 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-07-09 17:16:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:48,195 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-07-09 17:16:48,195 INFO L483 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) [2021-07-09 17:16:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-07-09 17:16:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:48,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:48,203 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:48,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-07-09 17:16:48,404 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-07-09 17:16:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:48,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416460839] [2021-07-09 17:16:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:48,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:48,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416460839] [2021-07-09 17:16:48,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416460839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:48,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097597565] [2021-07-09 17:16:48,458 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 [2021-07-09 17:16:48,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:16:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:48,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097597565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:48,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:48,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:48,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111389221] [2021-07-09 17:16:48,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:48,525 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 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) [2021-07-09 17:16:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:48,649 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-07-09 17:16:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:48,649 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 21 [2021-07-09 17:16:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:48,672 INFO L225 Difference]: With dead ends: 12763 [2021-07-09 17:16:48,673 INFO L226 Difference]: Without dead ends: 12763 [2021-07-09 17:16:48,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-07-09 17:16:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-07-09 17:16:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-07-09 17:16:48,891 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-07-09 17:16:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:48,891 INFO L482 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-07-09 17:16:48,891 INFO L483 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) [2021-07-09 17:16:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-07-09 17:16:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:48,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:48,900 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:49,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:49,101 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-07-09 17:16:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:49,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130474670] [2021-07-09 17:16:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:49,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130474670] [2021-07-09 17:16:49,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130474670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491369486] [2021-07-09 17:16:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:16:49,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:49,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:49,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491369486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:49,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-09 17:16:49,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776984586] [2021-07-09 17:16:49,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:49,208 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 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) [2021-07-09 17:16:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:49,320 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-07-09 17:16:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:49,320 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 21 [2021-07-09 17:16:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:49,346 INFO L225 Difference]: With dead ends: 12700 [2021-07-09 17:16:49,346 INFO L226 Difference]: Without dead ends: 12700 [2021-07-09 17:16:49,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-07-09 17:16:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-07-09 17:16:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-07-09 17:16:49,613 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-07-09 17:16:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:49,613 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-07-09 17:16:49,613 INFO L483 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) [2021-07-09 17:16:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-07-09 17:16:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:49,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:49,622 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:49,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-07-09 17:16:49,823 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-07-09 17:16:49,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:49,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42118816] [2021-07-09 17:16:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:49,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:49,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42118816] [2021-07-09 17:16:49,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42118816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081448951] [2021-07-09 17:16:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:49,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:16:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081448951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:49,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:49,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431471164] [2021-07-09 17:16:49,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:49,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:49,928 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 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) [2021-07-09 17:16:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:50,107 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-07-09 17:16:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:50,107 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 21 [2021-07-09 17:16:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:50,134 INFO L225 Difference]: With dead ends: 12712 [2021-07-09 17:16:50,135 INFO L226 Difference]: Without dead ends: 12710 [2021-07-09 17:16:50,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-07-09 17:16:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-07-09 17:16:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-07-09 17:16:50,368 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-07-09 17:16:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:50,368 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-07-09 17:16:50,368 INFO L483 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) [2021-07-09 17:16:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-07-09 17:16:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:50,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:50,377 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:50,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-07-09 17:16:50,578 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-07-09 17:16:50,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:50,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467139935] [2021-07-09 17:16:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:50,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:50,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467139935] [2021-07-09 17:16:50,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467139935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:50,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008194446] [2021-07-09 17:16:50,633 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 [2021-07-09 17:16:50,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:16:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:50,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:50,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008194446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:50,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:50,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742372448] [2021-07-09 17:16:50,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:50,693 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:50,902 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-07-09 17:16:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:50,933 INFO L225 Difference]: With dead ends: 12717 [2021-07-09 17:16:50,933 INFO L226 Difference]: Without dead ends: 12714 [2021-07-09 17:16:50,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-07-09 17:16:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-07-09 17:16:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-07-09 17:16:51,177 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-07-09 17:16:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:51,177 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-07-09 17:16:51,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-07-09 17:16:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:51,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:51,187 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3177 [2021-07-09 17:16:51,387 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:51,387 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-07-09 17:16:51,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:51,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149353675] [2021-07-09 17:16:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:51,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149353675] [2021-07-09 17:16:51,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149353675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124928464] [2021-07-09 17:16:51,438 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 [2021-07-09 17:16:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:51,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124928464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:51,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:51,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637182669] [2021-07-09 17:16:51,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:51,561 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:51,755 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-07-09 17:16:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:51,791 INFO L225 Difference]: With dead ends: 14561 [2021-07-09 17:16:51,791 INFO L226 Difference]: Without dead ends: 14557 [2021-07-09 17:16:51,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-07-09 17:16:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-07-09 17:16:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-07-09 17:16:52,059 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-07-09 17:16:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:52,059 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-07-09 17:16:52,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-07-09 17:16:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:52,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:52,068 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:52,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:52,269 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-07-09 17:16:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857758335] [2021-07-09 17:16:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:52,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857758335] [2021-07-09 17:16:52,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857758335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63572705] [2021-07-09 17:16:52,322 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 [2021-07-09 17:16:52,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:52,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:52,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63572705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:52,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:52,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-09 17:16:52,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235812342] [2021-07-09 17:16:52,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:52,381 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:52,569 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-07-09 17:16:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:16:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:52,604 INFO L225 Difference]: With dead ends: 14191 [2021-07-09 17:16:52,604 INFO L226 Difference]: Without dead ends: 14186 [2021-07-09 17:16:52,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-07-09 17:16:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-07-09 17:16:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-07-09 17:16:52,873 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-07-09 17:16:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:52,873 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-07-09 17:16:52,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-07-09 17:16:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:52,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:52,883 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:53,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:53,083 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-07-09 17:16:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:53,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520882452] [2021-07-09 17:16:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:53,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:53,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520882452] [2021-07-09 17:16:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520882452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:53,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372296048] [2021-07-09 17:16:53,141 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 [2021-07-09 17:16:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:16:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372296048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:53,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:53,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:16:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255272654] [2021-07-09 17:16:53,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:53,203 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 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) [2021-07-09 17:16:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:53,441 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-07-09 17:16:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:53,442 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 21 [2021-07-09 17:16:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:53,476 INFO L225 Difference]: With dead ends: 13610 [2021-07-09 17:16:53,476 INFO L226 Difference]: Without dead ends: 13604 [2021-07-09 17:16:53,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-07-09 17:16:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-07-09 17:16:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-07-09 17:16:53,780 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-07-09 17:16:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:53,780 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-07-09 17:16:53,781 INFO L483 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) [2021-07-09 17:16:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-07-09 17:16:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:53,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:53,790 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:53,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:53,991 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:53,991 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-07-09 17:16:53,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:53,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804879347] [2021-07-09 17:16:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:54,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804879347] [2021-07-09 17:16:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804879347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913302084] [2021-07-09 17:16:54,063 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 [2021-07-09 17:16:54,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:54,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:54,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913302084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:54,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:54,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165181391] [2021-07-09 17:16:54,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:54,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:54,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:54,123 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 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) [2021-07-09 17:16:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:54,323 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-07-09 17:16:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:54,323 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 21 [2021-07-09 17:16:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:54,356 INFO L225 Difference]: With dead ends: 13653 [2021-07-09 17:16:54,356 INFO L226 Difference]: Without dead ends: 13646 [2021-07-09 17:16:54,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-07-09 17:16:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-07-09 17:16:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-07-09 17:16:54,617 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-07-09 17:16:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:54,617 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-07-09 17:16:54,617 INFO L483 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) [2021-07-09 17:16:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-07-09 17:16:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:54,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:54,627 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:54,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3181,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:54,827 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-07-09 17:16:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:54,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599499072] [2021-07-09 17:16:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:54,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:54,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599499072] [2021-07-09 17:16:54,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599499072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408192231] [2021-07-09 17:16:54,895 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 [2021-07-09 17:16:54,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:16:54,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408192231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:54,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:54,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352119345] [2021-07-09 17:16:54,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:54,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:54,965 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 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) [2021-07-09 17:16:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:55,145 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-07-09 17:16:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:55,145 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 21 [2021-07-09 17:16:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:55,176 INFO L225 Difference]: With dead ends: 12749 [2021-07-09 17:16:55,176 INFO L226 Difference]: Without dead ends: 12742 [2021-07-09 17:16:55,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-07-09 17:16:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-07-09 17:16:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-07-09 17:16:55,417 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-07-09 17:16:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:55,417 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-07-09 17:16:55,417 INFO L483 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) [2021-07-09 17:16:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-07-09 17:16:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:55,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:55,427 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:55,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-07-09 17:16:55,627 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-07-09 17:16:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:55,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137391056] [2021-07-09 17:16:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:55,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:55,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137391056] [2021-07-09 17:16:55,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137391056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:55,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316228517] [2021-07-09 17:16:55,700 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 [2021-07-09 17:16:55,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:16:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:55,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:55,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316228517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:55,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:55,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 17:16:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811852781] [2021-07-09 17:16:55,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:55,830 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 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) [2021-07-09 17:16:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:56,005 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-07-09 17:16:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:56,006 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 21 [2021-07-09 17:16:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:56,035 INFO L225 Difference]: With dead ends: 12726 [2021-07-09 17:16:56,035 INFO L226 Difference]: Without dead ends: 12718 [2021-07-09 17:16:56,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-07-09 17:16:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-07-09 17:16:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-07-09 17:16:56,278 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-07-09 17:16:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:56,278 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-07-09 17:16:56,278 INFO L483 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) [2021-07-09 17:16:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-07-09 17:16:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:16:56,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:56,288 INFO L508 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:56,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3183 [2021-07-09 17:16:56,488 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-07-09 17:16:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:56,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334399264] [2021-07-09 17:16:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:56,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:56,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334399264] [2021-07-09 17:16:56,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334399264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760931819] [2021-07-09 17:16:56,568 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 [2021-07-09 17:16:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:16:56,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:56,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760931819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:56,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:56,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-09 17:16:56,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539305605] [2021-07-09 17:16:56,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:56,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:56,627 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 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) [2021-07-09 17:16:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:56,800 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-07-09 17:16:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:56,801 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 21 [2021-07-09 17:16:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:56,830 INFO L225 Difference]: With dead ends: 12691 [2021-07-09 17:16:56,830 INFO L226 Difference]: Without dead ends: 12682 [2021-07-09 17:16:56,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-07-09 17:16:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-07-09 17:16:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-07-09 17:16:57,078 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-07-09 17:16:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:57,078 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-07-09 17:16:57,078 INFO L483 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) [2021-07-09 17:16:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-07-09 17:16:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:16:57,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:57,088 INFO L508 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:57,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-09 17:16:57,288 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-07-09 17:16:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:57,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359669718] [2021-07-09 17:16:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:16:57,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:57,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359669718] [2021-07-09 17:16:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359669718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:57,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626723876] [2021-07-09 17:16:57,407 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 [2021-07-09 17:16:57,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:16:57,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:16:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626723876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:57,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:57,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:16:57,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661908561] [2021-07-09 17:16:57,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:16:57,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:16:57,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:57,564 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-07-09 17:16:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:57,757 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-07-09 17:16:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 [2021-07-09 17:16:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:57,797 INFO L225 Difference]: With dead ends: 16028 [2021-07-09 17:16:57,797 INFO L226 Difference]: Without dead ends: 16028 [2021-07-09 17:16:57,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-07-09 17:16:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-07-09 17:16:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-07-09 17:16:58,130 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-07-09 17:16:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:58,131 INFO L482 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-07-09 17:16:58,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-07-09 17:16:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-07-09 17:16:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:16:58,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:58,142 INFO L508 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:58,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-07-09 17:16:58,342 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:58,343 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-07-09 17:16:58,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:58,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986152574] [2021-07-09 17:16:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:16:58,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:58,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986152574] [2021-07-09 17:16:58,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986152574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:58,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233743506] [2021-07-09 17:16:58,498 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 [2021-07-09 17:16:58,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:16:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:58,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:16:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:16:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233743506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:58,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:58,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 17:16:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474329107] [2021-07-09 17:16:58,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:16:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:16:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:16:58,692 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:58,934 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-07-09 17:16:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:58,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:16:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:58,977 INFO L225 Difference]: With dead ends: 17733 [2021-07-09 17:16:58,977 INFO L226 Difference]: Without dead ends: 17728 [2021-07-09 17:16:58,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-07-09 17:16:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-07-09 17:16:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-07-09 17:16:59,296 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-07-09 17:16:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:59,296 INFO L482 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-07-09 17:16:59,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-07-09 17:16:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:16:59,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:59,309 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-07-09 17:16:59,510 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-07-09 17:16:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:59,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204769862] [2021-07-09 17:16:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:59,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204769862] [2021-07-09 17:16:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204769862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726100735] [2021-07-09 17:16:59,601 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 [2021-07-09 17:16:59,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:16:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:00,218 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-07-09 17:17:00,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:17:00,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-07-09 17:17:00,453 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 165 [2021-07-09 17:17:01,186 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 335 [2021-07-09 17:17:01,361 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 347 [2021-07-09 17:17:02,002 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 322 [2021-07-09 17:17:02,617 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 445 [2021-07-09 17:17:02,893 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 457 [2021-07-09 17:17:03,452 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 680 [2021-07-09 17:17:04,136 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 709 [2021-07-09 17:17:05,071 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 288 [2021-07-09 17:17:05,266 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 398 [2021-07-09 17:17:05,493 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 410 [2021-07-09 17:17:06,793 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 378 [2021-07-09 17:17:07,081 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 524 [2021-07-09 17:17:07,448 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 536 [2021-07-09 17:17:08,166 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 787 [2021-07-09 17:17:09,027 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 815 [2021-07-09 17:17:10,726 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-07-09 17:17:12,103 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 393 [2021-07-09 17:17:12,414 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 535 [2021-07-09 17:17:12,796 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 545 [2021-07-09 17:17:13,792 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 302 [2021-07-09 17:17:14,007 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 441 [2021-07-09 17:17:14,278 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 451 [2021-07-09 17:17:15,093 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 1021 DAG size of output: 856 [2021-07-09 17:17:16,060 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 882 [2021-07-09 17:17:16,786 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 329 [2021-07-09 17:17:17,279 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2021-07-09 17:17:17,859 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 453 [2021-07-09 17:17:18,264 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 619 [2021-07-09 17:17:18,760 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 717 DAG size of output: 629 [2021-07-09 17:17:19,347 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 316 [2021-07-09 17:17:20,129 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 359 [2021-07-09 17:17:20,423 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 517 [2021-07-09 17:17:20,780 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 527 [2021-07-09 17:17:21,800 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1157 DAG size of output: 982 [2021-07-09 17:17:23,016 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1181 DAG size of output: 1006 [2021-07-09 17:17:25,426 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 2034 DAG size of output: 1643 [2021-07-09 17:17:30,116 WARN L205 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-07-09 17:17:34,875 WARN L205 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-07-09 17:17:40,616 WARN L205 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 3492 DAG size of output: 2748 [2021-07-09 17:17:53,511 WARN L205 SmtUtils]: Spent 12.88 s on a formula simplification. DAG size of input: 2750 DAG size of output: 3883 [2021-07-09 17:18:03,265 WARN L205 SmtUtils]: Spent 9.73 s on a formula simplification. DAG size of input: 2554 DAG size of output: 2416 [2021-07-09 17:18:11,717 WARN L205 SmtUtils]: Spent 8.43 s on a formula simplification. DAG size of input: 2374 DAG size of output: 2990 [2021-07-09 17:18:11,881 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 1127 [2021-07-09 17:18:12,400 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 622 [2021-07-09 17:18:12,805 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 437 [2021-07-09 17:18:13,023 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 378 [2021-07-09 17:18:13,906 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 247 [2021-07-09 17:18:14,532 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 232 [2021-07-09 17:18:15,152 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 282 [2021-07-09 17:18:15,377 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 360 [2021-07-09 17:18:15,664 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 410 [2021-07-09 17:18:16,662 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 266 [2021-07-09 17:18:16,842 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 309 [2021-07-09 17:18:17,589 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 705 [2021-07-09 17:18:18,354 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 723 [2021-07-09 17:18:19,462 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 904 DAG size of output: 881 [2021-07-09 17:18:20,811 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 912 DAG size of output: 885 [2021-07-09 17:18:22,503 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1004 DAG size of output: 1043 [2021-07-09 17:18:22,809 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 390 [2021-07-09 17:18:23,018 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 358 [2021-07-09 17:18:23,199 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 356 [2021-07-09 17:18:24,211 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 274 [2021-07-09 17:18:25,383 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 420 [2021-07-09 17:18:25,690 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 429 [2021-07-09 17:18:26,106 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 437 [2021-07-09 17:18:26,719 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 573 [2021-07-09 17:18:27,594 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 711 [2021-07-09 17:18:28,745 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 806 DAG size of output: 827 [2021-07-09 17:18:31,917 WARN L205 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 1599 DAG size of output: 1609 [2021-07-09 17:18:35,594 WARN L205 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 1684 DAG size of output: 1612 [2021-07-09 17:18:37,219 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 734 DAG size of output: 755 [2021-07-09 17:18:38,345 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 686 DAG size of output: 850 [2021-07-09 17:18:39,320 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 885 [2021-07-09 17:18:40,252 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 830 [2021-07-09 17:18:41,230 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 669 DAG size of output: 809 [2021-07-09 17:18:41,618 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 523 [2021-07-09 17:18:42,123 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 543 [2021-07-09 17:18:43,626 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 513 [2021-07-09 17:18:44,916 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 323 [2021-07-09 17:18:45,112 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 332 [2021-07-09 17:18:45,763 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 705 [2021-07-09 17:18:46,568 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 819 DAG size of output: 712 [2021-07-09 17:18:46,863 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 491 [2021-07-09 17:18:48,049 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 357 [2021-07-09 17:18:48,255 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 366 [2021-07-09 17:18:48,516 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 374 [2021-07-09 17:18:49,034 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 501 [2021-07-09 17:18:50,275 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 462 [2021-07-09 17:18:50,925 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 655 [2021-07-09 17:18:52,632 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1360 DAG size of output: 1178 [2021-07-09 17:18:53,945 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 275 [2021-07-09 17:18:54,561 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 456 [2021-07-09 17:18:54,840 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 465 [2021-07-09 17:18:55,216 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 472 [2021-07-09 17:18:56,820 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 389 [2021-07-09 17:18:57,059 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 399 [2021-07-09 17:18:57,382 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 406 [2021-07-09 17:18:58,194 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 740 [2021-07-09 17:19:00,906 WARN L205 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 1844 DAG size of output: 1588 [2021-07-09 17:19:04,630 WARN L205 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 2295 DAG size of output: 2037 [2021-07-09 17:19:09,514 WARN L205 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 2693 DAG size of output: 2396 [2021-07-09 17:19:15,395 WARN L205 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 2993 DAG size of output: 2672 [2021-07-09 17:19:22,031 WARN L205 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 3079 DAG size of output: 2675 [2021-07-09 17:19:33,547 WARN L205 SmtUtils]: Spent 11.50 s on a formula simplification. DAG size of input: 4511 DAG size of output: 4036 [2021-07-09 17:19:41,937 WARN L205 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 2123 DAG size of output: 2258 [2021-07-09 17:19:42,128 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 1944 [2021-07-09 17:19:42,245 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 1194 [2021-07-09 17:19:43,017 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 896 [2021-07-09 17:19:43,125 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 703 [2021-07-09 17:19:43,905 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 936 [2021-07-09 17:19:44,737 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 904 [2021-07-09 17:19:45,896 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 307 [2021-07-09 17:19:47,021 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 303 [2021-07-09 17:19:47,814 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-07-09 17:19:48,840 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-07-09 17:19:49,204 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 435 [2021-07-09 17:19:50,111 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 726 [2021-07-09 17:19:51,125 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 752 [2021-07-09 17:19:52,827 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1436 DAG size of output: 1169 [2021-07-09 17:19:55,392 WARN L205 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 1888 DAG size of output: 1541 [2021-07-09 17:19:58,380 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 1897 DAG size of output: 1548 [2021-07-09 17:20:02,149 WARN L205 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 2194 DAG size of output: 1841 [2021-07-09 17:20:02,906 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 715 [2021-07-09 17:20:04,208 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 640 DAG size of output: 860 [2021-07-09 17:20:04,671 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 624 [2021-07-09 17:20:04,967 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 524 [2021-07-09 17:20:05,159 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 381 [2021-07-09 17:20:05,301 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-07-09 17:20:06,119 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 235 [2021-07-09 17:20:06,977 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 386 [2021-07-09 17:20:08,526 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 282 [2021-07-09 17:20:08,700 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 308 [2021-07-09 17:20:09,544 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 497 [2021-07-09 17:20:10,267 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 844 DAG size of output: 680 [2021-07-09 17:20:11,289 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1059 DAG size of output: 896 [2021-07-09 17:20:12,644 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1274 DAG size of output: 1024 [2021-07-09 17:20:14,047 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1307 DAG size of output: 1050 [2021-07-09 17:20:15,926 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1584 DAG size of output: 1241 [2021-07-09 17:20:18,094 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 1592 DAG size of output: 1248 [2021-07-09 17:20:21,118 WARN L205 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 1990 DAG size of output: 1585 [2021-07-09 17:20:25,093 WARN L205 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 2392 DAG size of output: 2000 [2021-07-09 17:20:33,862 WARN L205 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 4262 DAG size of output: 3485 [2021-07-09 17:20:35,272 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 961 DAG size of output: 1156 [2021-07-09 17:20:35,699 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 504 [2021-07-09 17:20:36,959 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 338 [2021-07-09 17:20:37,235 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 474 [2021-07-09 17:20:37,615 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 517 [2021-07-09 17:20:38,103 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 619 [2021-07-09 17:20:38,246 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 338 [2021-07-09 17:20:38,779 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 274 [2021-07-09 17:20:39,255 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 268 [2021-07-09 17:20:39,775 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 280 [2021-07-09 17:20:39,942 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 330 [2021-07-09 17:20:40,177 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 412 [2021-07-09 17:20:40,725 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 646 [2021-07-09 17:20:41,620 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 251 [2021-07-09 17:20:42,284 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 405 [2021-07-09 17:20:43,334 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 922 DAG size of output: 836 [2021-07-09 17:20:44,956 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1275 DAG size of output: 1138 [2021-07-09 17:20:46,700 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1319 DAG size of output: 1174 [2021-07-09 17:20:48,796 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1510 DAG size of output: 1345 [2021-07-09 17:20:51,250 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 1517 DAG size of output: 1351 [2021-07-09 17:20:51,985 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 654 [2021-07-09 17:20:52,427 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 516 [2021-07-09 17:20:54,505 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 302 [2021-07-09 17:20:54,838 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 407 [2021-07-09 17:20:55,321 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 535 [2021-07-09 17:20:55,811 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 553 [2021-07-09 17:20:56,443 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 562 [2021-07-09 17:20:57,400 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 782 [2021-07-09 17:20:58,822 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1132 DAG size of output: 1059 [2021-07-09 17:21:03,261 WARN L205 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 2465 DAG size of output: 2167 [2021-07-09 17:21:09,071 WARN L205 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 2888 DAG size of output: 2603 [2021-07-09 17:21:25,476 WARN L205 SmtUtils]: Spent 16.38 s on a formula simplification. DAG size of input: 6771 DAG size of output: 5743 [2021-07-09 17:21:43,802 WARN L205 SmtUtils]: Spent 18.26 s on a formula simplification. DAG size of input: 7100 DAG size of output: 5765 [2021-07-09 17:22:13,335 WARN L205 SmtUtils]: Spent 29.49 s on a formula simplification. DAG size of input: 10885 DAG size of output: 8680 [2021-07-09 17:22:47,489 WARN L205 SmtUtils]: Spent 34.10 s on a formula simplification. DAG size of input: 10943 DAG size of output: 8731 [2021-07-09 17:22:47,795 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 2534 [2021-07-09 17:22:51,341 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 1494 DAG size of output: 1464 [2021-07-09 17:22:54,482 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 1448 DAG size of output: 1789 [2021-07-09 17:22:56,406 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 704 DAG size of output: 759 [2021-07-09 17:22:57,732 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 660 DAG size of output: 862 [2021-07-09 17:22:58,830 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 649 DAG size of output: 869 [2021-07-09 17:22:59,542 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 506 [2021-07-09 17:23:00,077 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 470 [2021-07-09 17:23:01,781 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 343 [2021-07-09 17:23:02,954 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 298 [2021-07-09 17:23:03,255 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 486 [2021-07-09 17:23:03,558 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 492 [2021-07-09 17:23:03,964 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 499 [2021-07-09 17:23:04,768 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 736 [2021-07-09 17:23:05,178 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 455 [2021-07-09 17:23:07,019 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 318 [2021-07-09 17:23:07,354 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 523 [2021-07-09 17:23:07,690 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 532 [2021-07-09 17:23:08,132 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 538 [2021-07-09 17:23:09,544 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1311 DAG size of output: 1072 [2021-07-09 17:23:11,882 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 1688 DAG size of output: 1437 [2021-07-09 17:23:15,010 WARN L205 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 1981 DAG size of output: 1716 [2021-07-09 17:23:18,547 WARN L205 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 2095 DAG size of output: 1719 [2021-07-09 17:23:24,674 WARN L205 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 1318 DAG size of output: 1377 [2021-07-09 17:23:27,037 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 1157 DAG size of output: 1494 [2021-07-09 17:23:31,166 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 1152 DAG size of output: 1635 [2021-07-09 17:23:33,773 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1512 [2021-07-09 17:23:35,084 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 587 DAG size of output: 789 [2021-07-09 17:23:35,659 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 449 [2021-07-09 17:23:35,975 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 468 [2021-07-09 17:23:36,335 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 384 [2021-07-09 17:23:37,395 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 314 [2021-07-09 17:23:37,534 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 325 [2021-07-09 17:23:37,946 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 418 [2021-07-09 17:23:38,941 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 302 [2021-07-09 17:23:39,306 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 344 [2021-07-09 17:23:39,618 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 455 [2021-07-09 17:23:41,007 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 303 [2021-07-09 17:23:41,139 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 314 [2021-07-09 17:23:41,649 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 646 [2021-07-09 17:23:42,312 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 653 [2021-07-09 17:23:44,821 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 364 [2021-07-09 17:23:45,090 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 375 [2021-07-09 17:23:45,355 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 380 [2021-07-09 17:23:46,466 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1152 DAG size of output: 887 [2021-07-09 17:23:48,504 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1588 DAG size of output: 1285 [2021-07-09 17:23:52,464 WARN L205 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 2577 DAG size of output: 2019 [2021-07-09 17:23:58,659 WARN L205 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 3398 DAG size of output: 2696 [2021-07-09 17:24:06,923 WARN L205 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 4036 DAG size of output: 3293 [2021-07-09 17:24:16,405 WARN L205 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 4276 DAG size of output: 3318 [2021-07-09 17:24:30,984 WARN L205 SmtUtils]: Spent 14.56 s on a formula simplification. DAG size of input: 5882 DAG size of output: 4640 [2021-07-09 17:24:47,822 WARN L205 SmtUtils]: Spent 16.81 s on a formula simplification. DAG size of input: 5909 DAG size of output: 4666 [2021-07-09 17:24:51,391 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 1241 DAG size of output: 1212 [2021-07-09 17:24:53,680 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 1196 DAG size of output: 1415 [2021-07-09 17:24:54,488 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 621 [2021-07-09 17:24:55,080 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 660 [2021-07-09 17:24:56,026 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 681 [2021-07-09 17:24:56,386 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 486 [2021-07-09 17:24:56,537 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 373 [2021-07-09 17:24:56,965 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 315 [2021-07-09 17:24:58,048 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 255 [2021-07-09 17:24:58,559 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-07-09 17:24:58,833 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 421 [2021-07-09 17:24:59,126 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 430 [2021-07-09 17:24:59,555 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 539 [2021-07-09 17:25:00,216 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 712 [2021-07-09 17:25:01,040 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 719 [2021-07-09 17:25:02,389 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1112 DAG size of output: 993 [2021-07-09 17:25:04,271 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1316 DAG size of output: 1226 [2021-07-09 17:25:06,460 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 1408 DAG size of output: 1229 [2021-07-09 17:25:07,452 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 728 [2021-07-09 17:25:08,068 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 687 [2021-07-09 17:25:08,494 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 535 [2021-07-09 17:25:09,521 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 301 [2021-07-09 17:25:10,093 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 232 [2021-07-09 17:25:10,217 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-07-09 17:25:10,522 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 421 [2021-07-09 17:25:11,234 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 261 [2021-07-09 17:25:11,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 268 [2021-07-09 17:25:12,117 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 331 [2021-07-09 17:25:12,871 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 267 [2021-07-09 17:25:13,461 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 291 [2021-07-09 17:25:13,795 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 432 [2021-07-09 17:25:14,320 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 543 [2021-07-09 17:25:15,447 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1057 DAG size of output: 892 [2021-07-09 17:25:16,591 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1074 DAG size of output: 910 [2021-07-09 17:25:18,113 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1280 DAG size of output: 1096 [2021-07-09 17:25:19,894 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1287 DAG size of output: 1103 [2021-07-09 17:25:22,299 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 1531 DAG size of output: 1375 [2021-07-09 17:25:25,054 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 1682 DAG size of output: 1378 [2021-07-09 17:25:30,411 WARN L205 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 2845 DAG size of output: 2269 [2021-07-09 17:25:30,719 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 443 [2021-07-09 17:25:31,124 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 443 [2021-07-09 17:25:31,426 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 405 [2021-07-09 17:25:31,821 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 432 [2021-07-09 17:25:32,182 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 439 [2021-07-09 17:25:34,274 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 338 [2021-07-09 17:25:34,685 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 479 [2021-07-09 17:25:35,211 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 490 [2021-07-09 17:25:36,061 WARN L205 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 647 [2021-07-09 17:25:37,198 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 791 DAG size of output: 747 [2021-07-09 17:25:38,495 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 870 DAG size of output: 750 [2021-07-09 17:25:38,927 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 398 [2021-07-09 17:25:39,100 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-07-09 17:25:40,627 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 316 [2021-07-09 17:25:40,801 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 324 [2021-07-09 17:25:41,188 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 476 [2021-07-09 17:25:41,750 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 609 [2021-07-09 17:25:42,423 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 612 [2021-07-09 17:25:43,220 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 617 [2021-07-09 17:25:45,718 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 1361 DAG size of output: 1160 [2021-07-09 17:25:54,625 WARN L205 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 3674 DAG size of output: 3077 [2021-07-09 17:26:04,951 WARN L205 SmtUtils]: Spent 10.31 s on a formula simplification. DAG size of input: 3702 DAG size of output: 3106 [2021-07-09 17:26:34,761 WARN L205 SmtUtils]: Spent 29.78 s on a formula simplification. DAG size of input: 9204 DAG size of output: 7360 [2021-07-09 17:27:40,538 WARN L205 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 17329 DAG size of output: 12965 [2021-07-09 17:28:46,340 WARN L205 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 17329 DAG size of output: 12965 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown