/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:13:53,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:13:53,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:13:53,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:13:53,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:13:53,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:13:53,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:13:53,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:13:53,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:13:53,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:13:53,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:13:53,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:13:53,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:13:53,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:13:53,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:13:53,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:13:53,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:13:53,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:13:53,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:13:53,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:13:53,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:13:53,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:13:53,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:13:53,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:13:53,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:13:53,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:13:53,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:13:53,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:13:53,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:13:53,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:13:53,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:13:53,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:13:53,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:13:53,823 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:13:53,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:13:53,824 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:13:53,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:13:53,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:13:53,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:13:53,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:13:53,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:13:53,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:13:53,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:13:53,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:13:53,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:13:53,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:13:53,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:13:53,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:13:53,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:13:53,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:13:53,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:53,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:13:53,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:13:53,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:13:53,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:13:53,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:13:53,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:13:53,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:13:54,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:13:54,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:13:54,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:13:54,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:13:54,246 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:13:54,247 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-07-21 11:13:54,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0155681c7/379811e03f3d49a0b3febfe69d4ae8d7/FLAGf32a51c96 [2020-07-21 11:13:54,803 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:13:54,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2020-07-21 11:13:54,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0155681c7/379811e03f3d49a0b3febfe69d4ae8d7/FLAGf32a51c96 [2020-07-21 11:13:55,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0155681c7/379811e03f3d49a0b3febfe69d4ae8d7 [2020-07-21 11:13:55,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:13:55,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:13:55,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:55,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:13:55,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:13:55,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164c7927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55, skipping insertion in model container [2020-07-21 11:13:55,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:13:55,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:13:55,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:55,555 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:13:55,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:55,600 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:13:55,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55 WrapperNode [2020-07-21 11:13:55,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:55,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:13:55,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:13:55,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:13:55,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (1/1) ... [2020-07-21 11:13:55,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:13:55,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:13:55,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:13:55,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:13:55,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (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 [2020-07-21 11:13:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:13:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:13:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:13:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:13:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:13:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:13:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:13:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:13:56,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:13:56,271 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:13:56,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:56 BoogieIcfgContainer [2020-07-21 11:13:56,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:13:56,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:13:56,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:13:56,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:13:56,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:55" (1/3) ... [2020-07-21 11:13:56,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3117f9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:56, skipping insertion in model container [2020-07-21 11:13:56,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:55" (2/3) ... [2020-07-21 11:13:56,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3117f9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:56, skipping insertion in model container [2020-07-21 11:13:56,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:56" (3/3) ... [2020-07-21 11:13:56,292 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-07-21 11:13:56,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:13:56,309 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:13:56,323 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:13:56,353 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:13:56,354 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:13:56,354 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:13:56,354 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:13:56,354 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:13:56,354 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:13:56,355 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:13:56,355 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:13:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 11:13:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:56,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-07-21 11:13:56,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549354631] [2020-07-21 11:13:56,411 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:56,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549354631] [2020-07-21 11:13:56,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139748511] [2020-07-21 11:13:56,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,591 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-07-21 11:13:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,662 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-07-21 11:13:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,679 INFO L225 Difference]: With dead ends: 81 [2020-07-21 11:13:56,680 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 11:13:56,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 11:13:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-21 11:13:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 11:13:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-07-21 11:13:56,739 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-07-21 11:13:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,740 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-07-21 11:13:56,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-07-21 11:13:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-07-21 11:13:56,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377927598] [2020-07-21 11:13:56,960 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377927598] [2020-07-21 11:13:57,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711624082] [2020-07-21 11:13:57,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,050 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-07-21 11:13:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,098 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-07-21 11:13:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,104 INFO L225 Difference]: With dead ends: 107 [2020-07-21 11:13:57,106 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 11:13:57,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 11:13:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-21 11:13:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 11:13:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-07-21 11:13:57,136 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-07-21 11:13:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,137 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-07-21 11:13:57,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-07-21 11:13:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:57,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:57,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-07-21 11:13:57,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064196344] [2020-07-21 11:13:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064196344] [2020-07-21 11:13:57,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911760536] [2020-07-21 11:13:57,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,433 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-07-21 11:13:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,478 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-07-21 11:13:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,483 INFO L225 Difference]: With dead ends: 99 [2020-07-21 11:13:57,483 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 11:13:57,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 11:13:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-07-21 11:13:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 11:13:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-07-21 11:13:57,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-07-21 11:13:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,509 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-07-21 11:13:57,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-07-21 11:13:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:57,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:57,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,727 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,728 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-07-21 11:13:57,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306281952] [2020-07-21 11:13:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306281952] [2020-07-21 11:13:57,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397290767] [2020-07-21 11:13:57,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,804 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-07-21 11:13:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,837 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-07-21 11:13:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,840 INFO L225 Difference]: With dead ends: 124 [2020-07-21 11:13:57,840 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 11:13:57,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 11:13:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-07-21 11:13:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 11:13:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-07-21 11:13:57,854 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-07-21 11:13:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,854 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-07-21 11:13:57,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-07-21 11:13:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,072 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-07-21 11:13:58,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779209645] [2020-07-21 11:13:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779209645] [2020-07-21 11:13:58,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517804873] [2020-07-21 11:13:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,150 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-07-21 11:13:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,197 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-07-21 11:13:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,200 INFO L225 Difference]: With dead ends: 204 [2020-07-21 11:13:58,200 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 11:13:58,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 11:13:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-07-21 11:13:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 11:13:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-07-21 11:13:58,213 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-07-21 11:13:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,214 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-07-21 11:13:58,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-07-21 11:13:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:58,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,421 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-07-21 11:13:58,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354922076] [2020-07-21 11:13:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354922076] [2020-07-21 11:13:58,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486895969] [2020-07-21 11:13:58,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,490 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-07-21 11:13:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,513 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-07-21 11:13:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,515 INFO L225 Difference]: With dead ends: 183 [2020-07-21 11:13:58,515 INFO L226 Difference]: Without dead ends: 126 [2020-07-21 11:13:58,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-21 11:13:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-07-21 11:13:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 11:13:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-07-21 11:13:58,529 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-07-21 11:13:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,529 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-07-21 11:13:58,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-07-21 11:13:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:58,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,746 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-07-21 11:13:58,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213893172] [2020-07-21 11:13:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213893172] [2020-07-21 11:13:58,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373536394] [2020-07-21 11:13:58,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,816 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-07-21 11:13:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,841 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-07-21 11:13:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,845 INFO L225 Difference]: With dead ends: 228 [2020-07-21 11:13:58,845 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 11:13:58,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 11:13:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-07-21 11:13:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 11:13:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-07-21 11:13:58,878 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-07-21 11:13:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,878 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-07-21 11:13:58,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-07-21 11:13:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:58,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:59,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,101 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-07-21 11:13:59,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:59,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448608990] [2020-07-21 11:13:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:59,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:59,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448608990] [2020-07-21 11:13:59,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:59,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:59,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391301094] [2020-07-21 11:13:59,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:59,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,167 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-07-21 11:13:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:59,189 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-07-21 11:13:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:59,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:59,192 INFO L225 Difference]: With dead ends: 392 [2020-07-21 11:13:59,192 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 11:13:59,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 11:13:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-07-21 11:13:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 11:13:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-07-21 11:13:59,207 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-07-21 11:13:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:59,208 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-07-21 11:13:59,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-07-21 11:13:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:59,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:59,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:59,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,424 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-07-21 11:13:59,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:59,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164494304] [2020-07-21 11:13:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:59,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:59,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164494304] [2020-07-21 11:13:59,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:59,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672701327] [2020-07-21 11:13:59,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:59,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,476 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-07-21 11:13:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:59,508 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-07-21 11:13:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:59,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:59,510 INFO L225 Difference]: With dead ends: 348 [2020-07-21 11:13:59,510 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 11:13:59,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 11:13:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-07-21 11:13:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 11:13:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-07-21 11:13:59,527 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-07-21 11:13:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:59,528 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-07-21 11:13:59,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-07-21 11:13:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:59,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:59,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:59,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,746 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-07-21 11:13:59,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:59,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389056174] [2020-07-21 11:13:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:59,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:59,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389056174] [2020-07-21 11:13:59,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:59,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:59,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126907773] [2020-07-21 11:13:59,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:59,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:59,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:59,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,798 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-07-21 11:13:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:59,835 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-07-21 11:13:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:59,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:59,838 INFO L225 Difference]: With dead ends: 428 [2020-07-21 11:13:59,839 INFO L226 Difference]: Without dead ends: 426 [2020-07-21 11:13:59,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-07-21 11:13:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-07-21 11:13:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-21 11:13:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-07-21 11:13:59,853 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-07-21 11:13:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:59,854 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-07-21 11:13:59,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-07-21 11:13:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:59,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:59,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,073 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-07-21 11:14:00,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285294790] [2020-07-21 11:14:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285294790] [2020-07-21 11:14:00,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194913663] [2020-07-21 11:14:00,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,140 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-07-21 11:14:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:00,178 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-07-21 11:14:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:00,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:14:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:00,181 INFO L225 Difference]: With dead ends: 764 [2020-07-21 11:14:00,182 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 11:14:00,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 11:14:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-07-21 11:14:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-21 11:14:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-07-21 11:14:00,206 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-07-21 11:14:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:00,206 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-07-21 11:14:00,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-07-21 11:14:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:14:00,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:00,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,423 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-07-21 11:14:00,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111582940] [2020-07-21 11:14:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111582940] [2020-07-21 11:14:00,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856586111] [2020-07-21 11:14:00,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,504 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-07-21 11:14:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:00,538 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-07-21 11:14:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:00,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:14:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:00,542 INFO L225 Difference]: With dead ends: 672 [2020-07-21 11:14:00,543 INFO L226 Difference]: Without dead ends: 458 [2020-07-21 11:14:00,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-07-21 11:14:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-07-21 11:14:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-21 11:14:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-07-21 11:14:00,562 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-07-21 11:14:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:00,563 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-07-21 11:14:00,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-07-21 11:14:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:14:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:00,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,781 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-07-21 11:14:00,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822632942] [2020-07-21 11:14:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822632942] [2020-07-21 11:14:00,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311488831] [2020-07-21 11:14:00,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,836 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-07-21 11:14:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:00,876 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-07-21 11:14:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:00,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:14:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:00,881 INFO L225 Difference]: With dead ends: 812 [2020-07-21 11:14:00,882 INFO L226 Difference]: Without dead ends: 810 [2020-07-21 11:14:00,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-07-21 11:14:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-07-21 11:14:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-07-21 11:14:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-07-21 11:14:00,903 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-07-21 11:14:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:00,904 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-07-21 11:14:00,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-07-21 11:14:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:14:00,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:00,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:01,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,120 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-07-21 11:14:01,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:01,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766193342] [2020-07-21 11:14:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:01,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:01,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766193342] [2020-07-21 11:14:01,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:01,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:01,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240450145] [2020-07-21 11:14:01,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:01,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,174 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-07-21 11:14:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,217 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-07-21 11:14:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:14:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,223 INFO L225 Difference]: With dead ends: 1500 [2020-07-21 11:14:01,224 INFO L226 Difference]: Without dead ends: 874 [2020-07-21 11:14:01,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-07-21 11:14:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-07-21 11:14:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-07-21 11:14:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-07-21 11:14:01,257 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-07-21 11:14:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,258 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-07-21 11:14:01,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-07-21 11:14:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:14:01,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:01,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:01,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,475 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-07-21 11:14:01,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:01,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561014630] [2020-07-21 11:14:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:01,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:01,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561014630] [2020-07-21 11:14:01,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:01,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:01,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814802907] [2020-07-21 11:14:01,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:01,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,541 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-07-21 11:14:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,573 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-07-21 11:14:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:14:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,579 INFO L225 Difference]: With dead ends: 1308 [2020-07-21 11:14:01,580 INFO L226 Difference]: Without dead ends: 890 [2020-07-21 11:14:01,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-07-21 11:14:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-07-21 11:14:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-07-21 11:14:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-07-21 11:14:01,622 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-07-21 11:14:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,622 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-07-21 11:14:01,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-07-21 11:14:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:14:01,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:01,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:01,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,836 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-07-21 11:14:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:01,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465131059] [2020-07-21 11:14:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:01,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:01,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465131059] [2020-07-21 11:14:01,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:01,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:01,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141119665] [2020-07-21 11:14:01,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:01,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,888 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-07-21 11:14:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,921 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-07-21 11:14:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:14:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,930 INFO L225 Difference]: With dead ends: 1548 [2020-07-21 11:14:01,931 INFO L226 Difference]: Without dead ends: 1546 [2020-07-21 11:14:01,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-21 11:14:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-07-21 11:14:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-07-21 11:14:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-07-21 11:14:01,974 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-07-21 11:14:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,974 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-07-21 11:14:01,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-07-21 11:14:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:14:01,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:01,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:02,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,194 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-07-21 11:14:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:02,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266170691] [2020-07-21 11:14:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:02,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:02,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:02,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266170691] [2020-07-21 11:14:02,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:02,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:02,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149915449] [2020-07-21 11:14:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:02,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:02,234 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-07-21 11:14:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:02,278 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-07-21 11:14:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:02,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:14:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:02,287 INFO L225 Difference]: With dead ends: 2956 [2020-07-21 11:14:02,287 INFO L226 Difference]: Without dead ends: 1706 [2020-07-21 11:14:02,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-07-21 11:14:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-07-21 11:14:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-07-21 11:14:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-07-21 11:14:02,344 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-07-21 11:14:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:02,344 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-07-21 11:14:02,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-07-21 11:14:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:02,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:02,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,564 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-07-21 11:14:02,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:02,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522085500] [2020-07-21 11:14:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:02,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:02,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522085500] [2020-07-21 11:14:02,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:02,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:02,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45722934] [2020-07-21 11:14:02,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:02,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:02,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:02,617 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-07-21 11:14:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:02,679 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-07-21 11:14:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:02,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:02,689 INFO L225 Difference]: With dead ends: 2556 [2020-07-21 11:14:02,689 INFO L226 Difference]: Without dead ends: 1738 [2020-07-21 11:14:02,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-21 11:14:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-07-21 11:14:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-07-21 11:14:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-07-21 11:14:02,752 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-07-21 11:14:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:02,753 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-07-21 11:14:02,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-07-21 11:14:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:02,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:02,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:02,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,973 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-07-21 11:14:02,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:02,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927706131] [2020-07-21 11:14:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:03,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:03,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927706131] [2020-07-21 11:14:03,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:03,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:03,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026461152] [2020-07-21 11:14:03,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:03,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:03,041 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-07-21 11:14:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:03,105 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-07-21 11:14:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:03,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:03,122 INFO L225 Difference]: With dead ends: 2956 [2020-07-21 11:14:03,122 INFO L226 Difference]: Without dead ends: 2954 [2020-07-21 11:14:03,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-21 11:14:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-07-21 11:14:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-07-21 11:14:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-07-21 11:14:03,227 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-07-21 11:14:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:03,228 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-07-21 11:14:03,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-07-21 11:14:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:03,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:03,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:03,446 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-07-21 11:14:03,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:03,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667586820] [2020-07-21 11:14:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:03,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:03,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667586820] [2020-07-21 11:14:03,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:03,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:03,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050461748] [2020-07-21 11:14:03,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:03,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:03,497 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-07-21 11:14:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:03,590 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-07-21 11:14:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:03,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:03,610 INFO L225 Difference]: With dead ends: 5836 [2020-07-21 11:14:03,610 INFO L226 Difference]: Without dead ends: 3338 [2020-07-21 11:14:03,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-21 11:14:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-07-21 11:14:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-07-21 11:14:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-07-21 11:14:03,752 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-07-21 11:14:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:03,753 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-07-21 11:14:03,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-07-21 11:14:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:14:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:03,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:03,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:03,971 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-07-21 11:14:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:03,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670296949] [2020-07-21 11:14:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:04,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:04,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670296949] [2020-07-21 11:14:04,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:04,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:04,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326939852] [2020-07-21 11:14:04,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:04,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:04,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:04,036 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-07-21 11:14:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:04,111 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-07-21 11:14:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:04,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:14:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:04,132 INFO L225 Difference]: With dead ends: 5004 [2020-07-21 11:14:04,133 INFO L226 Difference]: Without dead ends: 3402 [2020-07-21 11:14:04,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-07-21 11:14:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-07-21 11:14:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-07-21 11:14:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-07-21 11:14:04,247 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-07-21 11:14:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:04,248 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-07-21 11:14:04,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-07-21 11:14:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:14:04,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:04,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:04,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:04,467 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-07-21 11:14:04,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:04,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719380623] [2020-07-21 11:14:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:04,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:04,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719380623] [2020-07-21 11:14:04,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:04,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:04,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098400694] [2020-07-21 11:14:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:04,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:04,507 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-07-21 11:14:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:04,615 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-07-21 11:14:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:04,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:14:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:04,665 INFO L225 Difference]: With dead ends: 9804 [2020-07-21 11:14:04,665 INFO L226 Difference]: Without dead ends: 6538 [2020-07-21 11:14:04,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-07-21 11:14:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-07-21 11:14:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-07-21 11:14:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-07-21 11:14:04,959 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-07-21 11:14:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:04,959 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-07-21 11:14:04,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-07-21 11:14:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:14:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:04,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:05,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:05,179 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-07-21 11:14:05,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:05,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649590449] [2020-07-21 11:14:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:05,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:05,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649590449] [2020-07-21 11:14:05,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:05,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:05,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326186402] [2020-07-21 11:14:05,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:05,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:05,221 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-07-21 11:14:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:05,337 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-07-21 11:14:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:05,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:14:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:05,353 INFO L225 Difference]: With dead ends: 7052 [2020-07-21 11:14:05,354 INFO L226 Difference]: Without dead ends: 7050 [2020-07-21 11:14:05,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-07-21 11:14:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-07-21 11:14:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-07-21 11:14:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-07-21 11:14:05,524 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-07-21 11:14:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:05,525 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-07-21 11:14:05,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-07-21 11:14:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:14:05,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:05,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:05,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:05,749 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-07-21 11:14:05,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:05,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786954929] [2020-07-21 11:14:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:05,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:05,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786954929] [2020-07-21 11:14:05,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:05,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:05,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622868427] [2020-07-21 11:14:05,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:05,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:05,791 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-07-21 11:14:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:05,989 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-07-21 11:14:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:05,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:14:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:06,008 INFO L225 Difference]: With dead ends: 10634 [2020-07-21 11:14:06,009 INFO L226 Difference]: Without dead ends: 10632 [2020-07-21 11:14:06,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-07-21 11:14:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-07-21 11:14:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-07-21 11:14:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-07-21 11:14:06,193 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-07-21 11:14:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:06,193 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-07-21 11:14:06,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-07-21 11:14:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:14:06,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:06,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:06,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:06,426 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-07-21 11:14:06,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:06,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344735182] [2020-07-21 11:14:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:06,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:06,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344735182] [2020-07-21 11:14:06,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:06,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158868094] [2020-07-21 11:14:06,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:06,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:06,468 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-07-21 11:14:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:06,639 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-07-21 11:14:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:06,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:14:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:06,640 INFO L225 Difference]: With dead ends: 22664 [2020-07-21 11:14:06,640 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:14:06,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:14:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:14:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:14:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:14:06,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-21 11:14:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:06,676 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:14:06,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:14:06,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:14:06,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:06,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:14:06,954 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:14:06,954 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:14:06,954 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:14:06,954 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:14:06,954 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:14:06,954 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-07-21 11:14:06,955 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,956 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,956 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-07-21 11:14:06,956 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-07-21 11:14:06,956 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-07-21 11:14:06,956 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,957 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 11:14:06,958 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,958 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-07-21 11:14:06,958 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-07-21 11:14:06,958 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-07-21 11:14:06,958 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-07-21 11:14:06,958 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-07-21 11:14:06,959 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,960 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 11:14:06,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:14:06 BoogieIcfgContainer [2020-07-21 11:14:06,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:14:06,978 INFO L168 Benchmark]: Toolchain (without parser) took 11794.85 ms. Allocated memory was 142.1 MB in the beginning and 352.8 MB in the end (delta: 210.8 MB). Free memory was 99.4 MB in the beginning and 85.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 224.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,978 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.32 ms. Allocated memory is still 142.1 MB. Free memory was 99.0 MB in the beginning and 88.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,984 INFO L168 Benchmark]: Boogie Preprocessor took 147.81 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 88.4 MB in the beginning and 177.9 MB in the end (delta: -89.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,986 INFO L168 Benchmark]: RCFGBuilder took 526.86 ms. Allocated memory is still 200.3 MB. Free memory was 177.9 MB in the beginning and 159.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,986 INFO L168 Benchmark]: TraceAbstraction took 10696.27 ms. Allocated memory was 200.3 MB in the beginning and 352.8 MB in the end (delta: 152.6 MB). Free memory was 158.4 MB in the beginning and 85.3 MB in the end (delta: 73.0 MB). Peak memory consumption was 225.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:06,988 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 414.32 ms. Allocated memory is still 142.1 MB. Free memory was 99.0 MB in the beginning and 88.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.81 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 88.4 MB in the beginning and 177.9 MB in the end (delta: -89.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 526.86 ms. Allocated memory is still 200.3 MB. Free memory was 177.9 MB in the beginning and 159.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10696.27 ms. Allocated memory was 200.3 MB in the beginning and 352.8 MB in the end (delta: 152.6 MB). Free memory was 158.4 MB in the beginning and 85.3 MB in the end (delta: 73.0 MB). Peak memory consumption was 225.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2552 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...