/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:34:26,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:34:26,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:34:26,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:34:26,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:34:26,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:34:26,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:34:26,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:34:26,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:34:26,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:34:26,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:34:26,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:34:26,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:34:26,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:34:26,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:34:26,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:34:26,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:34:26,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:34:26,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:34:26,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:34:26,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:34:26,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:34:26,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:34:26,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:34:26,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:34:26,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:34:26,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:34:26,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:34:26,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:34:26,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:34:26,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:34:26,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:34:26,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:34:26,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:34:26,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:34:26,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:34:26,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:34:26,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:34:26,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:34:26,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:34:26,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:34:26,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:34:26,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:34:26,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:34:26,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:34:26,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:34:26,818 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:34:26,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:34:26,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:34:26,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:34:26,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:34:26,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:34:26,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:34:26,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:34:26,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:34:26,821 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:34:26,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:34:26,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:34:26,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:34:26,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:34:26,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:34:26,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:34:26,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:34:26,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:34:26,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:34:26,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:34:26,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:34:26,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:34:26,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:34:26,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:34:26,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:34:26,824 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:34:27,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:34:27,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:34:27,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:34:27,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:34:27,329 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:34:27,331 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:27,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e491a00a1/196176cde87c49f2974df678375a5f32/FLAG5fcf3aab9 [2020-09-21 11:34:28,137 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:34:28,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:28,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e491a00a1/196176cde87c49f2974df678375a5f32/FLAG5fcf3aab9 [2020-09-21 11:34:28,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e491a00a1/196176cde87c49f2974df678375a5f32 [2020-09-21 11:34:28,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:34:28,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:34:28,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:28,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:34:28,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:34:28,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:28" (1/1) ... [2020-09-21 11:34:28,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d7d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:28, skipping insertion in model container [2020-09-21 11:34:28,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:28" (1/1) ... [2020-09-21 11:34:28,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:34:28,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:34:29,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:29,560 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:34:30,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:30,089 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:34:30,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30 WrapperNode [2020-09-21 11:34:30,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:30,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:34:30,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:34:30,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:34:30,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... [2020-09-21 11:34:30,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:34:30,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:34:30,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:34:30,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:34:30,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 11:34:30,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:34:30,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:34:30,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:34:30,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 11:34:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:34:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:34:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:34:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:34:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:34:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:34:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:34:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:34:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:34:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:34:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:34:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:34:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:34:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:34:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:34:33,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:34:33,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:34:33,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:33 BoogieIcfgContainer [2020-09-21 11:34:33,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:34:33,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:34:33,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:34:33,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:34:33,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:34:28" (1/3) ... [2020-09-21 11:34:33,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175ebf35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:33, skipping insertion in model container [2020-09-21 11:34:33,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:30" (2/3) ... [2020-09-21 11:34:33,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175ebf35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:33, skipping insertion in model container [2020-09-21 11:34:33,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:33" (3/3) ... [2020-09-21 11:34:33,266 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:33,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:34:33,306 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:34:33,335 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:34:33,390 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:34:33,390 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:34:33,391 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:34:33,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:34:33,391 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:34:33,391 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:34:33,391 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:34:33,391 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:34:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-09-21 11:34:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 11:34:33,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:33,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:33,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-09-21 11:34:33,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:33,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953826276] [2020-09-21 11:34:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:34,495 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:34,495 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:34,496 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 11:34:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:34:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-09-21 11:34:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-09-21 11:34:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:35,705 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:35,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:35,719 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:35,719 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:35,719 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:35,720 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:35,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:35,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:35,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:35,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:35,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:35,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:35,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:35,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953826276] [2020-09-21 11:34:35,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:35,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:35,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430140274] [2020-09-21 11:34:35,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:35,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:35,948 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-09-21 11:34:36,455 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:34:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:41,808 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-09-21 11:34:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:34:41,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 11:34:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:41,842 INFO L225 Difference]: With dead ends: 1515 [2020-09-21 11:34:41,842 INFO L226 Difference]: Without dead ends: 1299 [2020-09-21 11:34:41,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-09-21 11:34:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-09-21 11:34:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-09-21 11:34:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-09-21 11:34:42,034 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-09-21 11:34:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:42,036 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-09-21 11:34:42,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:34:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-09-21 11:34:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 11:34:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:42,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:42,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:34:42,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-09-21 11:34:42,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:42,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777484092] [2020-09-21 11:34:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:42,276 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:42,277 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:42,277 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:42,277 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:42,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 11:34:42,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:42,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:34:42,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-21 11:34:42,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-09-21 11:34:42,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:43,087 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:43,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:43,102 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:43,103 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:43,103 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:43,103 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:43,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:43,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:43,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:43,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:43,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:43,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777484092] [2020-09-21 11:34:43,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:43,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:43,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791684372] [2020-09-21 11:34:43,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:43,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:43,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:43,276 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-09-21 11:34:43,796 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:34:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:48,399 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-09-21 11:34:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:34:48,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 11:34:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:48,421 INFO L225 Difference]: With dead ends: 2671 [2020-09-21 11:34:48,422 INFO L226 Difference]: Without dead ends: 2289 [2020-09-21 11:34:48,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-09-21 11:34:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-09-21 11:34:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-09-21 11:34:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-09-21 11:34:48,563 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-09-21 11:34:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:48,565 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-09-21 11:34:48,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:34:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-09-21 11:34:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 11:34:48,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:48,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:48,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:34:48,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-09-21 11:34:48,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:48,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341788547] [2020-09-21 11:34:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:48,936 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:48,936 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:48,937 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:48,937 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:48,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 11:34:48,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:48,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:34:48,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:48,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:48,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-09-21 11:34:48,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-21 11:34:48,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:49,943 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:49,957 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:49,957 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:49,958 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:49,958 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:49,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:49,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:49,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:34:49,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:50,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341788547] [2020-09-21 11:34:50,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:50,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:50,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992694180] [2020-09-21 11:34:50,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:50,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:50,308 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-09-21 11:34:50,771 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:34:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:55,243 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-09-21 11:34:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:34:55,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 11:34:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:55,266 INFO L225 Difference]: With dead ends: 4943 [2020-09-21 11:34:55,266 INFO L226 Difference]: Without dead ends: 4229 [2020-09-21 11:34:55,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-09-21 11:34:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-09-21 11:34:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-09-21 11:34:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-09-21 11:34:55,407 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-09-21 11:34:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:55,408 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-09-21 11:34:55,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:34:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-09-21 11:34:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 11:34:55,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:55,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:55,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:34:55,419 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-09-21 11:34:55,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:55,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037325103] [2020-09-21 11:34:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:55,697 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:55,698 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:55,698 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:55,701 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:55,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 11:34:55,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:55,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:34:55,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-09-21 11:34:55,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-21 11:34:55,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:56,583 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:56,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:56,596 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:56,597 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:56,597 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:56,597 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:56,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:56,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:56,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037325103] [2020-09-21 11:34:56,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:56,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:56,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162078652] [2020-09-21 11:34:56,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:56,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:56,840 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-09-21 11:34:57,491 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:35:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:02,136 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-09-21 11:35:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:35:02,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-09-21 11:35:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:02,190 INFO L225 Difference]: With dead ends: 9359 [2020-09-21 11:35:02,190 INFO L226 Difference]: Without dead ends: 8029 [2020-09-21 11:35:02,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-09-21 11:35:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-09-21 11:35:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-09-21 11:35:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-09-21 11:35:02,534 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-09-21 11:35:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:02,535 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-09-21 11:35:02,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-09-21 11:35:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 11:35:02,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:02,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:02,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:35:02,556 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-09-21 11:35:02,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:02,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641080930] [2020-09-21 11:35:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:02,955 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:02,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:02,956 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:02,956 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:02,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-09-21 11:35:02,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:35:02,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:35:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:35:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-21 11:35:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:03,647 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:35:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:03,658 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:03,659 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:03,659 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:03,659 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:03,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:03,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:03,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:03,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:03,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641080930] [2020-09-21 11:35:03,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:03,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:35:03,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788426755] [2020-09-21 11:35:03,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:35:03,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:35:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:03,877 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-09-21 11:35:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:11,957 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-09-21 11:35:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:35:11,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-09-21 11:35:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:12,018 INFO L225 Difference]: With dead ends: 23754 [2020-09-21 11:35:12,018 INFO L226 Difference]: Without dead ends: 15742 [2020-09-21 11:35:12,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:35:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-09-21 11:35:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-09-21 11:35:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-09-21 11:35:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-09-21 11:35:12,569 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-09-21 11:35:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:12,569 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-09-21 11:35:12,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:35:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-09-21 11:35:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-21 11:35:12,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:12,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:12,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:35:12,599 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:12,599 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-09-21 11:35:12,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:12,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639525355] [2020-09-21 11:35:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:12,763 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:12,763 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:12,764 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:12,764 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:12,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-09-21 11:35:12,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:35:12,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:35:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-21 11:35:12,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:14,029 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:35:14,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:14,042 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:14,042 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:14,042 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:14,043 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:14,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:14,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:14,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:14,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:14,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:14,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639525355] [2020-09-21 11:35:14,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:14,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:14,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185352338] [2020-09-21 11:35:14,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:14,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:14,191 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states.