/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:49:32,717 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:49:32,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:49:32,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:49:32,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:49:32,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:49:32,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:49:32,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:49:32,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:49:32,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:49:32,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:49:32,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:49:32,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:49:32,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:49:32,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:49:32,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:49:32,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:49:32,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:49:32,787 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 [2020-07-20 21:49:32,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:49:32,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:49:32,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:49:32,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:49:32,819 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:49:32,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:49:32,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:49:32,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:49:32,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:49:32,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:49:32,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:49:32,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:49:32,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:49:32,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:49:32,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:49:32,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:49:32,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:49:32,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:49:32,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:49:32,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:49:32,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:49:32,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:32,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:49:32,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:49:32,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:49:32,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:49:32,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:32,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:49:32,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:49:32,826 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:49:33,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:49:33,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:49:33,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:49:33,190 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:49:33,190 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:49:33,191 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 21:49:33,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89b3c82f/2a36217f267d434aabffa7e0e8d028e0/FLAG86e1871b6 [2020-07-20 21:49:33,747 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:49:33,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 21:49:33,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89b3c82f/2a36217f267d434aabffa7e0e8d028e0/FLAG86e1871b6 [2020-07-20 21:49:34,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89b3c82f/2a36217f267d434aabffa7e0e8d028e0 [2020-07-20 21:49:34,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:49:34,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:49:34,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:34,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:49:34,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:49:34,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c291f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34, skipping insertion in model container [2020-07-20 21:49:34,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:49:34,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:49:34,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:34,333 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:49:34,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:34,376 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:49:34,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34 WrapperNode [2020-07-20 21:49:34,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:34,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:49:34,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:49:34,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:49:34,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (1/1) ... [2020-07-20 21:49:34,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:49:34,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:49:34,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:49:34,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:49:34,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (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 [2020-07-20 21:49:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:49:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:49:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:49:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:49:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:49:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:49:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:49:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:49:34,844 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:49:34,845 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:49:34,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:34 BoogieIcfgContainer [2020-07-20 21:49:34,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:49:34,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:49:34,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:49:34,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:49:34,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:34" (1/3) ... [2020-07-20 21:49:34,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1e4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:34, skipping insertion in model container [2020-07-20 21:49:34,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:34" (2/3) ... [2020-07-20 21:49:34,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1e4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:34, skipping insertion in model container [2020-07-20 21:49:34,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:34" (3/3) ... [2020-07-20 21:49:34,862 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-20 21:49:34,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:49:34,918 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:49:34,962 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:49:34,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:49:34,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:49:34,994 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:49:34,995 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:49:34,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:49:34,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:49:34,996 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:49:34,996 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:49:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 21:49:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 21:49:35,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:35,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:35,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-20 21:49:35,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:35,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441193894] [2020-07-20 21:49:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:35,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:35,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:35,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441193894] [2020-07-20 21:49:35,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:35,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132120184] [2020-07-20 21:49:35,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:35,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:35,241 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-20 21:49:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:35,301 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-20 21:49:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:35,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 21:49:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:35,322 INFO L225 Difference]: With dead ends: 57 [2020-07-20 21:49:35,323 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:49:35,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:49:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-20 21:49:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:49:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-20 21:49:35,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-20 21:49:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:35,396 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-20 21:49:35,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-20 21:49:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 21:49:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:35,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:35,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:35,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-20 21:49:35,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:35,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307473128] [2020-07-20 21:49:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:35,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:35,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:35,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307473128] [2020-07-20 21:49:35,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:35,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:35,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817872161] [2020-07-20 21:49:35,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:35,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:35,686 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-20 21:49:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:35,721 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-20 21:49:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:35,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 21:49:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:35,724 INFO L225 Difference]: With dead ends: 67 [2020-07-20 21:49:35,724 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:49:35,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:49:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-20 21:49:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:49:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-20 21:49:35,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-20 21:49:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:35,736 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-20 21:49:35,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-20 21:49:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:49:35,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:35,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:35,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:35,954 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-20 21:49:35,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:35,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202352934] [2020-07-20 21:49:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:35,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:35,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:36,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:36,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202352934] [2020-07-20 21:49:36,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:36,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:36,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071449944] [2020-07-20 21:49:36,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,024 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-20 21:49:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:36,048 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-20 21:49:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:36,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 21:49:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:36,050 INFO L225 Difference]: With dead ends: 63 [2020-07-20 21:49:36,050 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 21:49:36,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 21:49:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-20 21:49:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 21:49:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-07-20 21:49:36,059 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-07-20 21:49:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:36,060 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-07-20 21:49:36,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-07-20 21:49:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:49:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:36,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:36,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:36,276 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-07-20 21:49:36,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:36,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418858645] [2020-07-20 21:49:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:36,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:36,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:36,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418858645] [2020-07-20 21:49:36,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:36,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52147665] [2020-07-20 21:49:36,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:36,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,336 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-07-20 21:49:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:36,353 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-07-20 21:49:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:36,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 21:49:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:36,355 INFO L225 Difference]: With dead ends: 76 [2020-07-20 21:49:36,355 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 21:49:36,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 21:49:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-20 21:49:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 21:49:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-20 21:49:36,368 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-20 21:49:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:36,368 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-20 21:49:36,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-20 21:49:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:49:36,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:36,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:36,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:36,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-20 21:49:36,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:36,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042220111] [2020-07-20 21:49:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:36,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:36,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:36,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:36,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042220111] [2020-07-20 21:49:36,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:36,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:36,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178611301] [2020-07-20 21:49:36,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:36,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,638 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-20 21:49:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:36,660 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-20 21:49:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:36,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 21:49:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:36,662 INFO L225 Difference]: With dead ends: 124 [2020-07-20 21:49:36,662 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 21:49:36,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 21:49:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-20 21:49:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 21:49:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-20 21:49:36,674 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-20 21:49:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:36,674 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-20 21:49:36,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-20 21:49:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 21:49:36,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:36,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:36,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:36,886 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-20 21:49:36,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:36,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947004009] [2020-07-20 21:49:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:36,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:36,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:36,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:36,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947004009] [2020-07-20 21:49:36,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:36,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:36,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185877780] [2020-07-20 21:49:36,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:36,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:36,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:36,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,945 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-20 21:49:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:36,970 INFO L93 Difference]: Finished difference Result 130 states and 202 transitions. [2020-07-20 21:49:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:36,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 21:49:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:36,973 INFO L225 Difference]: With dead ends: 130 [2020-07-20 21:49:36,973 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 21:49:36,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 21:49:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-07-20 21:49:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 21:49:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 156 transitions. [2020-07-20 21:49:36,999 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 156 transitions. Word has length 17 [2020-07-20 21:49:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:36,999 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 156 transitions. [2020-07-20 21:49:36,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 156 transitions. [2020-07-20 21:49:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 21:49:37,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:37,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:37,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:37,214 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2146657713, now seen corresponding path program 1 times [2020-07-20 21:49:37,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:37,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352481077] [2020-07-20 21:49:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:37,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:37,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:37,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:37,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352481077] [2020-07-20 21:49:37,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:37,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:37,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394762601] [2020-07-20 21:49:37,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:37,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,271 INFO L87 Difference]: Start difference. First operand 102 states and 156 transitions. Second operand 3 states. [2020-07-20 21:49:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:37,306 INFO L93 Difference]: Finished difference Result 230 states and 354 transitions. [2020-07-20 21:49:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:37,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 21:49:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:37,309 INFO L225 Difference]: With dead ends: 230 [2020-07-20 21:49:37,309 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 21:49:37,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 21:49:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-20 21:49:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:49:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 198 transitions. [2020-07-20 21:49:37,341 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 198 transitions. Word has length 17 [2020-07-20 21:49:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:37,343 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 198 transitions. [2020-07-20 21:49:37,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 198 transitions. [2020-07-20 21:49:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:37,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:37,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:37,547 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1493244945, now seen corresponding path program 1 times [2020-07-20 21:49:37,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:37,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884107088] [2020-07-20 21:49:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:37,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:37,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:37,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884107088] [2020-07-20 21:49:37,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:37,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:37,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430250989] [2020-07-20 21:49:37,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:37,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:37,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:37,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,595 INFO L87 Difference]: Start difference. First operand 134 states and 198 transitions. Second operand 3 states. [2020-07-20 21:49:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:37,639 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2020-07-20 21:49:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:37,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:37,643 INFO L225 Difference]: With dead ends: 230 [2020-07-20 21:49:37,643 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 21:49:37,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 21:49:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2020-07-20 21:49:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-20 21:49:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 282 transitions. [2020-07-20 21:49:37,662 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 282 transitions. Word has length 18 [2020-07-20 21:49:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:37,663 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 282 transitions. [2020-07-20 21:49:37,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 282 transitions. [2020-07-20 21:49:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:37,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:37,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:37,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:37,875 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash 683898319, now seen corresponding path program 1 times [2020-07-20 21:49:37,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:37,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209759697] [2020-07-20 21:49:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:37,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:37,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:37,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:37,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:37,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209759697] [2020-07-20 21:49:37,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:37,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:37,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077288494] [2020-07-20 21:49:37,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:37,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,924 INFO L87 Difference]: Start difference. First operand 194 states and 282 transitions. Second operand 3 states. [2020-07-20 21:49:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:37,954 INFO L93 Difference]: Finished difference Result 438 states and 636 transitions. [2020-07-20 21:49:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:37,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:37,957 INFO L225 Difference]: With dead ends: 438 [2020-07-20 21:49:37,958 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 21:49:37,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 21:49:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2020-07-20 21:49:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-20 21:49:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 346 transitions. [2020-07-20 21:49:37,980 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 346 transitions. Word has length 18 [2020-07-20 21:49:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:37,980 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 346 transitions. [2020-07-20 21:49:37,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 346 transitions. [2020-07-20 21:49:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:37,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:37,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:38,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:38,199 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash -953830938, now seen corresponding path program 1 times [2020-07-20 21:49:38,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:38,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690443779] [2020-07-20 21:49:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:38,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:38,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:38,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690443779] [2020-07-20 21:49:38,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:38,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:38,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480187452] [2020-07-20 21:49:38,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:38,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:38,261 INFO L87 Difference]: Start difference. First operand 250 states and 346 transitions. Second operand 3 states. [2020-07-20 21:49:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:38,302 INFO L93 Difference]: Finished difference Result 412 states and 563 transitions. [2020-07-20 21:49:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:38,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:38,310 INFO L225 Difference]: With dead ends: 412 [2020-07-20 21:49:38,310 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 21:49:38,311 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 [2020-07-20 21:49:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 21:49:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 378. [2020-07-20 21:49:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-07-20 21:49:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2020-07-20 21:49:38,334 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 19 [2020-07-20 21:49:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:38,335 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2020-07-20 21:49:38,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2020-07-20 21:49:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:38,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:38,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:38,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:38,553 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1763177564, now seen corresponding path program 1 times [2020-07-20 21:49:38,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:38,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079833532] [2020-07-20 21:49:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:49:38,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:38,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:38,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079833532] [2020-07-20 21:49:38,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:38,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:38,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824069613] [2020-07-20 21:49:38,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:38,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:38,599 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand 3 states. [2020-07-20 21:49:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:38,641 INFO L93 Difference]: Finished difference Result 842 states and 1138 transitions. [2020-07-20 21:49:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:38,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:38,642 INFO L225 Difference]: With dead ends: 842 [2020-07-20 21:49:38,643 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:49:38,646 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 [2020-07-20 21:49:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:49:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:49:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:49:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:49:38,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-20 21:49:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:38,648 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:49:38,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:49:38,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:49:38,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:38,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:49:38,942 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:49:38,943 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:38,943 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:38,943 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:49:38,943 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:49:38,943 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:49:38,943 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,944 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,945 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-20 21:49:38,946 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-20 21:49:38,946 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-20 21:49:38,946 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-20 21:49:38,946 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,946 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-20 21:49:38,946 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 21:49:38,947 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-20 21:49:38,947 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-20 21:49:38,947 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 21:49:38,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:38 BoogieIcfgContainer [2020-07-20 21:49:38,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:49:38,966 INFO L168 Benchmark]: Toolchain (without parser) took 4873.38 ms. Allocated memory was 136.8 MB in the beginning and 230.2 MB in the end (delta: 93.3 MB). Free memory was 102.2 MB in the beginning and 127.9 MB in the end (delta: -25.7 MB). Peak memory consumption was 67.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,968 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.70 ms. Allocated memory is still 136.8 MB. Free memory was 101.7 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,970 INFO L168 Benchmark]: Boogie Preprocessor took 141.90 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 180.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,971 INFO L168 Benchmark]: RCFGBuilder took 330.43 ms. Allocated memory is still 200.3 MB. Free memory was 180.3 MB in the beginning and 164.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,972 INFO L168 Benchmark]: TraceAbstraction took 4109.86 ms. Allocated memory was 200.3 MB in the beginning and 230.2 MB in the end (delta: 29.9 MB). Free memory was 163.5 MB in the beginning and 127.9 MB in the end (delta: 35.6 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:38,976 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.70 ms. Allocated memory is still 136.8 MB. Free memory was 101.7 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.90 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 180.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.43 ms. Allocated memory is still 200.3 MB. Free memory was 180.3 MB in the beginning and 164.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4109.86 ms. Allocated memory was 200.3 MB in the beginning and 230.2 MB in the end (delta: 29.9 MB). Free memory was 163.5 MB in the beginning and 127.9 MB in the end (delta: 35.6 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 507 SDtfs, 216 SDslu, 341 SDs, 0 SdLazy, 60 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 132 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 186 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 4790 SizeOfPredicates, 0 NumberOfNonLiveVariables, 604 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...