/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:53:20,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:53:20,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:53:20,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:53:20,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:53:20,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:53:20,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:53:20,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:53:20,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:53:20,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:53:20,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:53:20,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:53:20,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:53:20,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:53:20,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:53:20,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:53:20,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:53:20,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:53:20,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:53:20,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:53:20,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:53:20,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:53:20,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:53:20,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:53:20,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:53:20,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:53:20,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:53:20,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:53:20,116 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 20:53:20,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:53:20,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:53:20,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:53:20,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:53:20,134 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:53:20,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:53:20,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:53:20,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:53:20,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:53:20,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:53:20,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:53:20,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:53:20,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:53:20,136 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:53:20,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:53:20,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:53:20,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:53:20,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:53:20,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:53:20,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:53:20,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:53:20,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:53:20,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:53:20,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:53:20,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:53:20,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:53:20,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:53:20,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:53:20,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:53:20,139 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 -> 2 [2020-07-21 20:53:20,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:53:20,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:53:20,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:53:20,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:53:20,466 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:53:20,467 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 20:53:20,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208d91415/e2988d6a1ee6427eb744f78845bc17b6/FLAG784a2654b [2020-07-21 20:53:20,988 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:53:20,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 20:53:20,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208d91415/e2988d6a1ee6427eb744f78845bc17b6/FLAG784a2654b [2020-07-21 20:53:21,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208d91415/e2988d6a1ee6427eb744f78845bc17b6 [2020-07-21 20:53:21,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:53:21,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:53:21,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:53:21,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:53:21,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:53:21,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c9b103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21, skipping insertion in model container [2020-07-21 20:53:21,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:53:21,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:53:21,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:53:21,583 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:53:21,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:53:21,619 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:53:21,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21 WrapperNode [2020-07-21 20:53:21,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:53:21,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:53:21,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:53:21,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:53:21,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (1/1) ... [2020-07-21 20:53:21,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:53:21,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:53:21,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:53:21,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:53:21,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (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 20:53:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:53:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:53:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:53:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:53:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:53:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:53:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:53:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:53:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:53:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:53:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:53:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:53:21,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:53:22,049 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:53:22,049 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:53:22,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:22 BoogieIcfgContainer [2020-07-21 20:53:22,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:53:22,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:53:22,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:53:22,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:53:22,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:53:21" (1/3) ... [2020-07-21 20:53:22,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29589b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:22, skipping insertion in model container [2020-07-21 20:53:22,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:21" (2/3) ... [2020-07-21 20:53:22,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29589b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:22, skipping insertion in model container [2020-07-21 20:53:22,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:22" (3/3) ... [2020-07-21 20:53:22,070 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-21 20:53:22,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:53:22,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:53:22,108 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:53:22,134 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:53:22,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:53:22,135 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:53:22,135 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:53:22,135 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:53:22,135 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:53:22,135 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:53:22,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:53:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 20:53:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:53:22,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:53:22,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:53:22,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:53:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:53:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 20:53:22,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:53:22,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343130190] [2020-07-21 20:53:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:53:22,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:53:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:53:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:53:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:53:22,531 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 20:53:22,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:53:22,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343130190] [2020-07-21 20:53:22,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:53:22,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:53:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712881186] [2020-07-21 20:53:22,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:53:22,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:53:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:53:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:53:22,557 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 20:53:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:53:22,679 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-07-21 20:53:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:53:22,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:53:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:53:22,692 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:53:22,692 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 20:53:22,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:53:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 20:53:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 20:53:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 20:53:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 20:53:22,747 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 20:53:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:53:22,748 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 20:53:22,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:53:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 20:53:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 20:53:22,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:53:22,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:53:22,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:53:22,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:53:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:53:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 20:53:22,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:53:22,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927149561] [2020-07-21 20:53:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:53:23,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:53:23,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:53:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 20:53:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:53:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:53:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:53:23,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:53:29,559 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 20:53:29,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:53:31,610 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-21 20:53:31,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:53:31,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:53:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-21 20:53:32,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927149561] [2020-07-21 20:53:32,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:53:32,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 20:53:32,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4303126] [2020-07-21 20:53:32,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:53:32,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:53:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:53:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132 [2020-07-21 20:53:32,658 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-07-21 20:53:41,398 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 20:53:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:53:56,047 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 20:53:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:53:56,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-21 20:53:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:53:56,050 INFO L225 Difference]: With dead ends: 32 [2020-07-21 20:53:56,051 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 20:53:56,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210 [2020-07-21 20:53:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 20:53:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-21 20:53:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:53:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-21 20:53:56,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-21 20:53:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:53:56,062 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-21 20:53:56,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:53:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-21 20:53:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 20:53:56,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:53:56,064 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:53:56,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:53:56,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:53:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:53:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-21 20:53:56,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:53:56,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26754107] [2020-07-21 20:53:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:53:56,321 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:53:56,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:53:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:53:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:53:56,517 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:53:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 20:53:56,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:53:58,929 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 20:53:58,933 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 20:53:58,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:53:58,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:53:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 20:53:59,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26754107] [2020-07-21 20:53:59,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:53:59,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-21 20:53:59,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220199816] [2020-07-21 20:53:59,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:53:59,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:53:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:53:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:53:59,010 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-21 20:54:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:54:01,239 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-21 20:54:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:54:01,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-21 20:54:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:54:01,248 INFO L225 Difference]: With dead ends: 34 [2020-07-21 20:54:01,248 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 20:54:01,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:54:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 20:54:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 20:54:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:54:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 20:54:01,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-21 20:54:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:54:01,263 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 20:54:01,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:54:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 20:54:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 20:54:01,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:54:01,268 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:54:01,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:54:01,482 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:54:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:54:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 20:54:01,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:54:01,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58997607] [2020-07-21 20:54:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:54:01,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:54:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:54:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 20:54:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:54:05,733 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 20:54:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:54:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:54:05,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:54:19,346 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 20:54:19,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:54:21,411 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-21 20:54:21,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:54:21,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:54:25,285 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0))) (= (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0)))) is different from true [2020-07-21 20:54:25,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:54:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-21 20:54:25,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58997607] [2020-07-21 20:54:25,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:54:25,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-21 20:54:25,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027690363] [2020-07-21 20:54:25,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 20:54:25,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:54:25,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 20:54:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-21 20:54:25,322 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-21 20:54:52,166 WARN L193 SmtUtils]: Spent 18.45 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 20:55:04,024 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 20:55:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:55:26,117 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-21 20:55:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:55:26,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-21 20:55:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:55:26,151 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:55:26,151 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:55:26,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-21 20:55:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:55:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 20:55:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 20:55:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-21 20:55:26,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-21 20:55:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:55:26,163 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-21 20:55:26,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 20:55:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-21 20:55:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 20:55:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:55:26,166 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:55:26,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:55:26,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:55:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:55:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-21 20:55:26,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:55:26,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114622851] [2020-07-21 20:55:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:55:26,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:55:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:55:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 20:55:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:55:33,127 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 20:55:37,905 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 20:55:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 20:55:38,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:55:38,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:55:45,662 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 20:56:00,112 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 20:56:00,146 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 20:56:00,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:56:02,309 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-21 20:56:02,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:56:04,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 20:56:16,396 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-21 20:56:18,902 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 20:56:18,905 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 20:56:18,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:56:20,974 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* c_main_~z~0 c_main_~a~0) .cse0) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)))) (not (= (+ .cse1 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-21 20:56:20,979 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 20:56:20,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 20:56:27,263 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (forall ((v_main_~a~0_BEFORE_CALL_17 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_17 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (let ((.cse0 (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14)) (.cse1 (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14)) (.cse2 (+ (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17) v_main_~x~0_BEFORE_CALL_17))) (or (not (= (+ .cse0 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14)) (+ .cse1 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17)))) (= .cse2 (+ v_main_~a~0_BEFORE_CALL_17 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_17))) (= (+ .cse0 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17)) (+ (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14))) (= (+ v_main_~a~0_BEFORE_CALL_17 .cse1) .cse2))))) is different from true [2020-07-21 20:56:37,625 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (= 0 c___VERIFIER_assert_~cond) (forall ((v_main_~a~0_BEFORE_CALL_17 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_17 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (let ((.cse0 (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14)) (.cse1 (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14)) (.cse2 (+ (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17) v_main_~x~0_BEFORE_CALL_17))) (or (not (= (+ .cse0 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14)) (+ .cse1 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17)))) (= .cse2 (+ v_main_~a~0_BEFORE_CALL_17 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_17))) (= (+ .cse0 (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~y~0_BEFORE_CALL_17)) (+ (* v_main_~x~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) (* v_main_~a~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14))) (= (+ v_main_~a~0_BEFORE_CALL_17 .cse1) .cse2))))) is different from true [2020-07-21 20:56:39,697 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0))) (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse1) (+ (* c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse1))))) is different from true [2020-07-21 20:56:39,714 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 20:56:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 19 not checked. [2020-07-21 20:56:39,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114622851] [2020-07-21 20:56:39,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:56:39,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2020-07-21 20:56:39,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898270829] [2020-07-21 20:56:39,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 20:56:39,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:56:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 20:56:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=167, Unknown=18, NotChecked=186, Total=420 [2020-07-21 20:56:39,735 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 21 states. [2020-07-21 20:56:47,851 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_main_~x~0 c_main_~z~0))) (let ((.cse1 (* c_main_~z~0 c_main_~a~0)) (.cse0 (= (+ .cse3 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0))))) (and .cse0 (= (+ .cse1 c_main_~a~0) c_main_~x~0) (let ((.cse2 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse2) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 .cse2) (+ .cse3 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)))) (not .cse0))) (= c_main_~z~0 c_main_~y~0)))) is different from false [2020-07-21 20:56:50,102 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~z~0 c_main_~a~0)) (.cse0 (* c_main_~x~0 c_main_~z~0))) (and (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0))) (= (+ .cse1 c_main_~a~0) c_main_~x~0) (let ((.cse2 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse2) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 .cse2) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)))))) (= c_main_~z~0 c_main_~y~0))) is different from false [2020-07-21 20:56:52,145 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~z~0 c_main_~a~0))) (and (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ .cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) (= c_main_~x~0 (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse1 c_main_~a~0)) (= c_main_~y~0 (* c_main_~z~0 c_main_~z~0)))) is different from false [2020-07-21 20:57:01,814 WARN L193 SmtUtils]: Spent 9.12 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 20:57:12,114 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 20:57:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:57:27,792 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-21 20:57:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 20:57:27,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-07-21 20:57:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:57:27,818 INFO L225 Difference]: With dead ends: 44 [2020-07-21 20:57:27,818 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 20:57:27,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 76.7s TimeCoverageRelationStatistics Valid=78, Invalid=278, Unknown=22, NotChecked=378, Total=756 [2020-07-21 20:57:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 20:57:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 20:57:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:57:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-21 20:57:27,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-07-21 20:57:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:57:27,828 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-21 20:57:27,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 20:57:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-21 20:57:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 20:57:27,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:57:27,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:57:28,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:57:28,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:57:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:57:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-21 20:57:28,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:57:28,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399230329] [2020-07-21 20:57:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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