/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:18:19,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:18:19,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:18:19,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:18:19,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:18:19,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:18:19,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:18:19,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:18:19,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:18:19,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:18:19,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:18:19,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:18:19,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:18:19,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:18:19,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:18:19,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:18:19,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:18:19,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:18:19,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:18:19,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:18:19,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:18:19,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:18:19,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:18:19,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:18:19,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:18:19,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:18:19,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:18:19,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:18:19,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:18:19,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:18:19,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:18:19,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:18:19,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:18:19,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:18:19,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:18:19,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:18:19,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:18:19,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:18:19,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:18:19,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:18:19,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:18:19,149 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 [2020-09-24 19:18:19,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:18:19,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:18:19,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:18:19,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:18:19,211 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:18:19,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:18:19,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:18:19,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:18:19,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:18:19,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:18:19,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:18:19,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:18:19,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:18:19,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:18:19,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:18:19,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:18:19,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:18:19,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:18:19,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:18:19,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:18:19,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:18:19,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:18:19,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:18:19,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:18:19,218 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.rcfgbuilder: Size of a code block -> SingleStatement 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:18:19,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:18:19,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:18:19,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:18:19,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:18:19,697 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:18:19,698 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-24 19:18:19,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef4b6e59b/49a71f2a8d3c455aa5dbf7fd90da4e2d/FLAG20666aa49 [2020-09-24 19:18:20,371 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:18:20,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-24 19:18:20,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef4b6e59b/49a71f2a8d3c455aa5dbf7fd90da4e2d/FLAG20666aa49 [2020-09-24 19:18:20,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef4b6e59b/49a71f2a8d3c455aa5dbf7fd90da4e2d [2020-09-24 19:18:20,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:18:20,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:18:20,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:18:20,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:18:20,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:18:20,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:20" (1/1) ... [2020-09-24 19:18:20,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f159ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:20, skipping insertion in model container [2020-09-24 19:18:20,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:20" (1/1) ... [2020-09-24 19:18:20,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:18:20,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:18:21,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:18:21,042 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:18:21,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:18:21,080 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:18:21,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21 WrapperNode [2020-09-24 19:18:21,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:18:21,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:18:21,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:18:21,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:18:21,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (1/1) ... [2020-09-24 19:18:21,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:18:21,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:18:21,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:18:21,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:18:21,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (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 [2020-09-24 19:18:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:18:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:18:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-09-24 19:18:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:18:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:18:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:18:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-09-24 19:18:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:18:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:18:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:18:21,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:18:21,573 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:18:21,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:21 BoogieIcfgContainer [2020-09-24 19:18:21,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:18:21,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:18:21,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:18:21,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:18:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:18:20" (1/3) ... [2020-09-24 19:18:21,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73808db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:21, skipping insertion in model container [2020-09-24 19:18:21,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:21" (2/3) ... [2020-09-24 19:18:21,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73808db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:21, skipping insertion in model container [2020-09-24 19:18:21,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:21" (3/3) ... [2020-09-24 19:18:21,589 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-09-24 19:18:21,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:18:21,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:18:21,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:18:21,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:18:21,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:18:21,679 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:18:21,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:18:21,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:18:21,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:18:21,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:18:21,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:18:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-09-24 19:18:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 19:18:21,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:21,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:21,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-09-24 19:18:21,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:21,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656446746] [2020-09-24 19:18:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:18:22,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:18:22,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-09-24 19:18:22,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:18:22,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:18:22,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:18:22,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:22,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:22,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:22,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:22,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:18:22,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:22,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:18:22,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:22,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:18:22,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656446746] [2020-09-24 19:18:22,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:22,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:18:22,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631919068] [2020-09-24 19:18:22,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:22,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:22,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:22,546 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-09-24 19:18:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:22,717 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-24 19:18:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:18:22,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-24 19:18:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:22,733 INFO L225 Difference]: With dead ends: 58 [2020-09-24 19:18:22,733 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 19:18:22,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 19:18:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-24 19:18:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 19:18:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-24 19:18:22,794 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-09-24 19:18:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:22,794 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-24 19:18:22,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-24 19:18:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 19:18:22,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:22,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:22,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:18:22,799 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-09-24 19:18:22,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:22,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684665441] [2020-09-24 19:18:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:22,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 19:18:23,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:23,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-09-24 19:18:23,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 19:18:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:23,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:23,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:23,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:23,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:18:23,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 19:18:23,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:18:23,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684665441] [2020-09-24 19:18:23,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:23,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:18:23,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211380430] [2020-09-24 19:18:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:18:23,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:18:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:18:23,332 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-09-24 19:18:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:23,402 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-09-24 19:18:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:23,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-24 19:18:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:23,404 INFO L225 Difference]: With dead ends: 46 [2020-09-24 19:18:23,405 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 19:18:23,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 19:18:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-09-24 19:18:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 19:18:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-24 19:18:23,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-09-24 19:18:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:23,417 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-24 19:18:23,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:18:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-24 19:18:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 19:18:23,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:23,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:23,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:18:23,420 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-09-24 19:18:23,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:23,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027141327] [2020-09-24 19:18:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 19:18:23,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:23,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-09-24 19:18:23,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:23,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 19:18:23,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:23,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:23,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:23,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:23,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:23,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:23,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:23,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:23,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:23,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:18:23,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 19:18:23,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 19:18:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:24,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:18:24,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:18:24,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:18:24,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027141327] [2020-09-24 19:18:24,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:24,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:18:24,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250847645] [2020-09-24 19:18:24,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:18:24,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:18:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:24,120 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-09-24 19:18:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:24,311 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-09-24 19:18:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:18:24,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-24 19:18:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:24,314 INFO L225 Difference]: With dead ends: 56 [2020-09-24 19:18:24,314 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 19:18:24,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:18:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 19:18:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 19:18:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 19:18:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-24 19:18:24,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2020-09-24 19:18:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:24,327 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-24 19:18:24,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:18:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-24 19:18:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 19:18:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:24,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:24,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:18:24,333 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2030561919, now seen corresponding path program 1 times [2020-09-24 19:18:24,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:24,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5633431] [2020-09-24 19:18:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 19:18:24,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:24,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-09-24 19:18:24,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 19:18:24,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:24,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:24,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:24,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:24,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:24,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:24,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:18:24,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 19:18:24,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 19:18:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:18:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:24,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:24,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:24,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:24,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:18:24,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:24,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:18:24,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:24,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:18:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:18:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:24,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:18:24,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5633431] [2020-09-24 19:18:24,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:24,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:18:24,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725040134] [2020-09-24 19:18:24,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:18:24,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:18:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:24,921 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-09-24 19:18:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:25,077 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-09-24 19:18:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:18:25,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-24 19:18:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:25,080 INFO L225 Difference]: With dead ends: 56 [2020-09-24 19:18:25,080 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 19:18:25,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:18:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 19:18:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-24 19:18:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 19:18:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-24 19:18:25,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2020-09-24 19:18:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:25,090 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-24 19:18:25,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:18:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-24 19:18:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 19:18:25,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:25,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:25,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:18:25,092 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2122258312, now seen corresponding path program 1 times [2020-09-24 19:18:25,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:25,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428614587] [2020-09-24 19:18:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:25,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 19:18:25,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:18:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-09-24 19:18:25,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 19:18:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:18:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:25,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:25,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:18:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:25,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:25,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:18:26,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:26,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-24 19:18:26,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:26,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 19:18:26,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:26,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:26,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:18:26,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:26,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:18:26,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:26,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 19:18:26,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428614587] [2020-09-24 19:18:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:26,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:18:26,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275366582] [2020-09-24 19:18:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:18:26,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:18:26,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:26,268 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-09-24 19:18:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:26,377 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-24 19:18:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:18:26,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 19:18:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:26,380 INFO L225 Difference]: With dead ends: 48 [2020-09-24 19:18:26,380 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 19:18:26,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:18:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 19:18:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 19:18:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 19:18:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-09-24 19:18:26,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-09-24 19:18:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:26,388 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-09-24 19:18:26,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:18:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-09-24 19:18:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 19:18:26,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:26,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:26,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:18:26,390 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 404002040, now seen corresponding path program 1 times [2020-09-24 19:18:26,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:26,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792413913] [2020-09-24 19:18:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:26,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 19:18:27,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:18:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:18:27,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:18:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 19:18:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:18:27,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:27,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:27,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:27,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:27,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:18:27,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:27,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-09-24 19:18:27,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 19:18:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:18:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:18:27,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 19:18:27,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792413913] [2020-09-24 19:18:27,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:27,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:18:27,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232821629] [2020-09-24 19:18:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:18:27,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:18:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:18:27,807 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-09-24 19:18:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:27,904 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-09-24 19:18:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:18:27,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 19:18:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:27,907 INFO L225 Difference]: With dead ends: 53 [2020-09-24 19:18:27,907 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 19:18:27,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:18:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 19:18:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-24 19:18:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 19:18:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-09-24 19:18:27,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2020-09-24 19:18:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:27,916 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-09-24 19:18:27,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:18:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-09-24 19:18:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 19:18:27,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:27,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:27,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:18:27,918 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1010225367, now seen corresponding path program 1 times [2020-09-24 19:18:27,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:27,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537413905] [2020-09-24 19:18:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:27,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:28,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 19:18:28,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 19:18:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-24 19:18:28,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:18:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 19:18:28,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:18:28,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:28,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:28,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:28,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:28,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:18:28,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:28,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:28,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:18:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:29,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:29,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 19:18:29,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:18:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:18:29,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:18:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 19:18:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:30,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:18:30,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:18:30,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-09-24 19:18:30,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:18:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 19:18:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:18:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:30,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:30,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:30,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:18:30,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:30,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 19:18:30,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:30,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:18:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:18:30,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-24 19:18:30,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537413905] [2020-09-24 19:18:30,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:18:30,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:18:30,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197312757] [2020-09-24 19:18:30,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:18:30,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:18:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:18:30,380 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-09-24 19:18:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:30,515 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-09-24 19:18:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:18:30,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-09-24 19:18:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:30,516 INFO L225 Difference]: With dead ends: 47 [2020-09-24 19:18:30,517 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 19:18:30,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:18:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 19:18:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 19:18:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 19:18:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 19:18:30,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-09-24 19:18:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:30,523 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 19:18:30,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:18:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 19:18:30,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 19:18:30,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:18:30,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 19:18:30,672 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 19:18:30,672 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:18:30,672 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-09-24 19:18:30,673 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-09-24 19:18:30,673 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-24 19:18:30,673 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-24 19:18:30,673 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-09-24 19:18:30,674 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-09-24 19:18:30,674 INFO L268 CegarLoopResult]: For program point L25-2(line 25) no Hoare annotation was computed. [2020-09-24 19:18:30,674 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-09-24 19:18:30,674 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-24 19:18:30,674 INFO L268 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-09-24 19:18:30,674 INFO L268 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-09-24 19:18:30,675 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 19:18:30,675 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-24 19:18:30,675 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-09-24 19:18:30,676 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 19:18:30,676 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-09-24 19:18:30,676 INFO L268 CegarLoopResult]: For program point L15(lines 15 26) no Hoare annotation was computed. [2020-09-24 19:18:30,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:18:30,676 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 19:18:30,676 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 19:18:30,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-09-24 19:18:30,677 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-09-24 19:18:30,678 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-09-24 19:18:30,678 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-09-24 19:18:30,678 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-09-24 19:18:30,679 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-24 19:18:30,679 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-09-24 19:18:30,679 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-09-24 19:18:30,679 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-24 19:18:30,679 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-24 19:18:30,679 INFO L271 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: true [2020-09-24 19:18:30,680 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-24 19:18:30,680 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-09-24 19:18:30,680 INFO L268 CegarLoopResult]: For program point L37-2(line 37) no Hoare annotation was computed. [2020-09-24 19:18:30,680 INFO L268 CegarLoopResult]: For program point L37-3(line 37) no Hoare annotation was computed. [2020-09-24 19:18:30,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:18:30 BoogieIcfgContainer [2020-09-24 19:18:30,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:18:30,695 INFO L168 Benchmark]: Toolchain (without parser) took 10002.24 ms. Allocated memory was 138.9 MB in the beginning and 280.0 MB in the end (delta: 141.0 MB). Free memory was 102.2 MB in the beginning and 110.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 132.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:30,702 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:18:30,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.91 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:30,706 INFO L168 Benchmark]: Boogie Preprocessor took 121.44 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 180.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:30,707 INFO L168 Benchmark]: RCFGBuilder took 376.41 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 165.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:30,708 INFO L168 Benchmark]: TraceAbstraction took 9109.60 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 165.1 MB in the beginning and 110.6 MB in the end (delta: 54.6 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:30,720 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.91 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.44 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 180.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.41 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 165.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9109.60 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 165.1 MB in the beginning and 110.6 MB in the end (delta: 54.6 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.8s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 203 SDslu, 755 SDs, 0 SdLazy, 353 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 36 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 15747 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 41/41 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...