/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 SequenceOfStatements --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:28:25,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:28:25,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:28:25,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:28:25,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:28:25,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:28:25,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:28:25,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:28:25,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:28:25,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:28:25,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:28:25,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:28:25,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:28:25,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:28:25,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:28:25,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:28:25,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:28:25,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:28:25,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:28:25,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:28:25,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:28:25,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:28:25,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:28:25,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:28:25,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:28:25,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:28:25,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:28:25,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:28:25,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:28:25,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:28:25,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:28:25,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:28:25,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:28:25,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:28:25,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:28:25,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:28:25,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:28:25,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:28:25,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:28:25,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:28:25,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:28:25,146 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 [2020-10-12 19:28:25,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:28:25,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:28:25,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:28:25,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:28:25,196 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:28:25,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:28:25,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:28:25,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:28:25,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:28:25,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:28:25,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:28:25,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:28:25,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:28:25,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:28:25,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:28:25,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:28:25,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:28:25,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:28:25,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:28:25,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:28:25,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:28:25,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:28:25,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:28:25,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:28:25,202 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 -> SequenceOfStatements 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:28:25,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:28:25,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:28:25,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:28:25,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:28:25,568 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:28:25,568 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:28:25,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43447ba37/41794e7eed72407a9df34238653290f3/FLAG460d3790a [2020-10-12 19:28:26,046 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:28:26,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:28:26,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43447ba37/41794e7eed72407a9df34238653290f3/FLAG460d3790a [2020-10-12 19:28:26,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43447ba37/41794e7eed72407a9df34238653290f3 [2020-10-12 19:28:26,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:28:26,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:28:26,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:28:26,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:28:26,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:28:26,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129a1035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26, skipping insertion in model container [2020-10-12 19:28:26,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:28:26,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:28:26,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:28:26,765 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:28:26,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:28:26,917 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:28:26,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26 WrapperNode [2020-10-12 19:28:26,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:28:26,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:28:26,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:28:26,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:28:26,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (1/1) ... [2020-10-12 19:28:26,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:28:26,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:28:26,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:28:26,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:28:26,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (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 [2020-10-12 19:28:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:28:27,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:28:27,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:28:27,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:28:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:28:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:28:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:28:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:28:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:28:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:28:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:28:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:28:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:28:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:28:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:28:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:28:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:28:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:28:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:28:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:28:27,492 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:28:27,492 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:28:27,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:28:27 BoogieIcfgContainer [2020-10-12 19:28:27,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:28:27,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:28:27,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:28:27,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:28:27,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:28:26" (1/3) ... [2020-10-12 19:28:27,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad5ca60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:28:27, skipping insertion in model container [2020-10-12 19:28:27,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:28:26" (2/3) ... [2020-10-12 19:28:27,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad5ca60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:28:27, skipping insertion in model container [2020-10-12 19:28:27,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:28:27" (3/3) ... [2020-10-12 19:28:27,506 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:28:27,517 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:28:27,525 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:28:27,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:28:27,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:28:27,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:28:27,565 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:28:27,565 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:28:27,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:28:27,566 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:28:27,566 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:28:27,566 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:28:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-12 19:28:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 19:28:27,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:27,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:27,597 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1803074216, now seen corresponding path program 1 times [2020-10-12 19:28:27,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:27,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768281405] [2020-10-12 19:28:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:29,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:29,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 19:28:29,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:28:29,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1421 [2020-10-12 19:28:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:28:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:28:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:28:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:28:29,520 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-12 19:28:29,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:29,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:29,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:29,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:28:29,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:29,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:29,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:29,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768281405] [2020-10-12 19:28:29,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:29,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:28:29,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287812442] [2020-10-12 19:28:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:28:29,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:28:29,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:28:29,622 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 6 states. [2020-10-12 19:28:29,848 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:28:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:30,277 INFO L93 Difference]: Finished difference Result 331 states and 516 transitions. [2020-10-12 19:28:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:28:30,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-12 19:28:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:30,293 INFO L225 Difference]: With dead ends: 331 [2020-10-12 19:28:30,294 INFO L226 Difference]: Without dead ends: 263 [2020-10-12 19:28:30,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:28:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-12 19:28:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 101. [2020-10-12 19:28:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 19:28:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 146 transitions. [2020-10-12 19:28:30,356 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 146 transitions. Word has length 40 [2020-10-12 19:28:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:30,356 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 146 transitions. [2020-10-12 19:28:30,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:28:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 146 transitions. [2020-10-12 19:28:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:28:30,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:30,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:30,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:28:30,359 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash -713813853, now seen corresponding path program 1 times [2020-10-12 19:28:30,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:30,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124777231] [2020-10-12 19:28:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:31,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:32,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:32,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:28:32,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:28:32,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-12 19:28:32,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:32,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:28:32,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:32,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 19:28:32,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:32,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:32,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:32,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:32,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:32,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:32,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:28:32,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:32,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:32,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124777231] [2020-10-12 19:28:32,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:28:32,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492297161] [2020-10-12 19:28:32,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:28:32,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:28:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:28:32,733 INFO L87 Difference]: Start difference. First operand 101 states and 146 transitions. Second operand 7 states. [2020-10-12 19:28:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:33,167 INFO L93 Difference]: Finished difference Result 288 states and 437 transitions. [2020-10-12 19:28:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:28:33,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-12 19:28:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:33,170 INFO L225 Difference]: With dead ends: 288 [2020-10-12 19:28:33,170 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 19:28:33,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:28:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 19:28:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2020-10-12 19:28:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 19:28:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 171 transitions. [2020-10-12 19:28:33,188 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 171 transitions. Word has length 42 [2020-10-12 19:28:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:33,188 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 171 transitions. [2020-10-12 19:28:33,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:28:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 171 transitions. [2020-10-12 19:28:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:28:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:33,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:33,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:28:33,191 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1539321490, now seen corresponding path program 1 times [2020-10-12 19:28:33,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:33,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107400391] [2020-10-12 19:28:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:33,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:33,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:33,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:33,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:33,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:28:33,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:28:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-12 19:28:33,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:28:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:28:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:28:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:34,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:34,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:34,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:28:34,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:34,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107400391] [2020-10-12 19:28:34,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:34,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:28:34,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433784559] [2020-10-12 19:28:34,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:28:34,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:28:34,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:28:34,051 INFO L87 Difference]: Start difference. First operand 118 states and 171 transitions. Second operand 6 states. [2020-10-12 19:28:34,222 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 19:28:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:34,493 INFO L93 Difference]: Finished difference Result 358 states and 543 transitions. [2020-10-12 19:28:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:28:34,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-12 19:28:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:34,496 INFO L225 Difference]: With dead ends: 358 [2020-10-12 19:28:34,496 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 19:28:34,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:28:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 19:28:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 118. [2020-10-12 19:28:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 19:28:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 170 transitions. [2020-10-12 19:28:34,529 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 170 transitions. Word has length 42 [2020-10-12 19:28:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:34,529 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 170 transitions. [2020-10-12 19:28:34,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:28:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 170 transitions. [2020-10-12 19:28:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:28:34,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:34,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:34,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:28:34,535 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1519272147, now seen corresponding path program 1 times [2020-10-12 19:28:34,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:34,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024484929] [2020-10-12 19:28:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:35,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:28:35,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:28:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-12 19:28:35,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:28:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:28:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:28:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:35,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:35,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:35,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:35,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:28:35,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:35,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:35,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:35,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:35,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:35,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024484929] [2020-10-12 19:28:35,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:35,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:28:35,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317998039] [2020-10-12 19:28:35,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:28:35,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:28:35,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:28:35,720 INFO L87 Difference]: Start difference. First operand 118 states and 170 transitions. Second operand 5 states. [2020-10-12 19:28:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:36,215 INFO L93 Difference]: Finished difference Result 341 states and 516 transitions. [2020-10-12 19:28:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:28:36,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-12 19:28:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:36,221 INFO L225 Difference]: With dead ends: 341 [2020-10-12 19:28:36,221 INFO L226 Difference]: Without dead ends: 263 [2020-10-12 19:28:36,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:28:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-12 19:28:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2020-10-12 19:28:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 19:28:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 386 transitions. [2020-10-12 19:28:36,275 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 386 transitions. Word has length 42 [2020-10-12 19:28:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:36,276 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 386 transitions. [2020-10-12 19:28:36,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:28:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 386 transitions. [2020-10-12 19:28:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:28:36,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:36,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:36,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:28:36,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -690068631, now seen corresponding path program 1 times [2020-10-12 19:28:36,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:36,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895135618] [2020-10-12 19:28:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:36,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:36,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:38,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:38,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:28:38,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:28:38,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-12 19:28:38,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:28:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:38,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 19:28:38,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:38,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:38,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:38,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:38,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:38,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:38,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:28:38,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:38,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:38,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:38,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:38,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895135618] [2020-10-12 19:28:38,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:38,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:28:38,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945835903] [2020-10-12 19:28:38,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:28:38,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:28:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:28:38,420 INFO L87 Difference]: Start difference. First operand 259 states and 386 transitions. Second operand 7 states. [2020-10-12 19:28:38,553 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-12 19:28:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:38,962 INFO L93 Difference]: Finished difference Result 685 states and 1030 transitions. [2020-10-12 19:28:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:28:38,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-12 19:28:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:38,965 INFO L225 Difference]: With dead ends: 685 [2020-10-12 19:28:38,966 INFO L226 Difference]: Without dead ends: 469 [2020-10-12 19:28:38,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:28:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-12 19:28:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 283. [2020-10-12 19:28:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-12 19:28:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 419 transitions. [2020-10-12 19:28:39,001 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 419 transitions. Word has length 42 [2020-10-12 19:28:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:39,001 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 419 transitions. [2020-10-12 19:28:39,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:28:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 419 transitions. [2020-10-12 19:28:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:28:39,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:39,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:39,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:28:39,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1086339747, now seen corresponding path program 1 times [2020-10-12 19:28:39,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:39,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947109846] [2020-10-12 19:28:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:39,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:39,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:40,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:40,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:28:40,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:28:40,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-12 19:28:40,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:28:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:40,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:28:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:41,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:41,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:41,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:28:41,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:41,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947109846] [2020-10-12 19:28:41,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:41,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:28:41,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871567799] [2020-10-12 19:28:41,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:28:41,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:28:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:28:41,211 INFO L87 Difference]: Start difference. First operand 283 states and 419 transitions. Second operand 7 states. [2020-10-12 19:28:41,348 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-12 19:28:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:41,848 INFO L93 Difference]: Finished difference Result 647 states and 975 transitions. [2020-10-12 19:28:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:28:41,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-12 19:28:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:41,853 INFO L225 Difference]: With dead ends: 647 [2020-10-12 19:28:41,854 INFO L226 Difference]: Without dead ends: 478 [2020-10-12 19:28:41,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:28:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-12 19:28:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 269. [2020-10-12 19:28:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-12 19:28:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 398 transitions. [2020-10-12 19:28:41,919 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 398 transitions. Word has length 42 [2020-10-12 19:28:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:41,923 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 398 transitions. [2020-10-12 19:28:41,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:28:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 398 transitions. [2020-10-12 19:28:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:28:41,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:41,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:41,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:28:41,928 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 472416514, now seen corresponding path program 1 times [2020-10-12 19:28:41,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:41,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498152907] [2020-10-12 19:28:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:42,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:42,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:28:42,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:28:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-12 19:28:42,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:28:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 19:28:42,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:28:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:42,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:42,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:42,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:42,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:42,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:28:42,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:42,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498152907] [2020-10-12 19:28:42,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:28:42,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:28:42,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865367555] [2020-10-12 19:28:42,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:28:42,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:28:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:28:42,759 INFO L87 Difference]: Start difference. First operand 269 states and 398 transitions. Second operand 5 states. [2020-10-12 19:28:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:43,064 INFO L93 Difference]: Finished difference Result 415 states and 614 transitions. [2020-10-12 19:28:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:28:43,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-12 19:28:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:43,069 INFO L225 Difference]: With dead ends: 415 [2020-10-12 19:28:43,069 INFO L226 Difference]: Without dead ends: 413 [2020-10-12 19:28:43,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:28:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-12 19:28:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 273. [2020-10-12 19:28:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-12 19:28:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 400 transitions. [2020-10-12 19:28:43,110 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 400 transitions. Word has length 43 [2020-10-12 19:28:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:43,111 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 400 transitions. [2020-10-12 19:28:43,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:28:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 400 transitions. [2020-10-12 19:28:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:28:43,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:43,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:43,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:28:43,113 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2025742101, now seen corresponding path program 1 times [2020-10-12 19:28:43,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:43,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814216299] [2020-10-12 19:28:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:43,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:48,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:48,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:28:48,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:28:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:28:48,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:28:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:28:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:48,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:48,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:48,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:48,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:28:48,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:48,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814216299] [2020-10-12 19:28:48,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:48,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:28:48,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657249444] [2020-10-12 19:28:48,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:28:48,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:28:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:28:48,309 INFO L87 Difference]: Start difference. First operand 273 states and 400 transitions. Second operand 8 states. [2020-10-12 19:28:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:48,947 INFO L93 Difference]: Finished difference Result 949 states and 1427 transitions. [2020-10-12 19:28:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:28:48,947 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:28:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:48,953 INFO L225 Difference]: With dead ends: 949 [2020-10-12 19:28:48,953 INFO L226 Difference]: Without dead ends: 802 [2020-10-12 19:28:48,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:28:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-10-12 19:28:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 448. [2020-10-12 19:28:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-12 19:28:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 671 transitions. [2020-10-12 19:28:49,029 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 671 transitions. Word has length 61 [2020-10-12 19:28:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:49,031 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 671 transitions. [2020-10-12 19:28:49,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:28:49,031 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 671 transitions. [2020-10-12 19:28:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:28:49,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:49,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:49,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:28:49,033 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:49,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2049487323, now seen corresponding path program 1 times [2020-10-12 19:28:49,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:49,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061734882] [2020-10-12 19:28:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:52,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:52,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:54,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:54,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:28:54,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:28:54,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:28:54,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:54,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:28:54,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:54,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:28:54,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:54,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:54,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:54,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:54,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:28:54,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:54,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:54,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061734882] [2020-10-12 19:28:54,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:54,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:28:54,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021663634] [2020-10-12 19:28:54,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:28:54,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:54,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:28:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:28:54,281 INFO L87 Difference]: Start difference. First operand 448 states and 671 transitions. Second operand 8 states. [2020-10-12 19:28:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:55,076 INFO L93 Difference]: Finished difference Result 2064 states and 3099 transitions. [2020-10-12 19:28:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:28:55,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:28:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:55,085 INFO L225 Difference]: With dead ends: 2064 [2020-10-12 19:28:55,085 INFO L226 Difference]: Without dead ends: 1659 [2020-10-12 19:28:55,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:28:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2020-10-12 19:28:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 885. [2020-10-12 19:28:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2020-10-12 19:28:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1315 transitions. [2020-10-12 19:28:55,219 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1315 transitions. Word has length 61 [2020-10-12 19:28:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:55,220 INFO L479 AbstractCegarLoop]: Abstraction has 885 states and 1315 transitions. [2020-10-12 19:28:55,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:28:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1315 transitions. [2020-10-12 19:28:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:28:55,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:55,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:55,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:28:55,222 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1653216207, now seen corresponding path program 1 times [2020-10-12 19:28:55,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:55,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029534825] [2020-10-12 19:28:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:00,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:00,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:29:00,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:29:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:00,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:00,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:00,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:00,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:29:00,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:00,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:00,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:00,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:00,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029534825] [2020-10-12 19:29:00,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:00,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:29:00,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432210123] [2020-10-12 19:29:00,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:29:00,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:29:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:29:00,530 INFO L87 Difference]: Start difference. First operand 885 states and 1315 transitions. Second operand 8 states. [2020-10-12 19:29:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:01,391 INFO L93 Difference]: Finished difference Result 2733 states and 4035 transitions. [2020-10-12 19:29:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:29:01,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-12 19:29:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:01,401 INFO L225 Difference]: With dead ends: 2733 [2020-10-12 19:29:01,401 INFO L226 Difference]: Without dead ends: 1885 [2020-10-12 19:29:01,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:29:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2020-10-12 19:29:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1095. [2020-10-12 19:29:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-10-12 19:29:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1579 transitions. [2020-10-12 19:29:01,564 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1579 transitions. Word has length 61 [2020-10-12 19:29:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:01,565 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1579 transitions. [2020-10-12 19:29:01,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:29:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1579 transitions. [2020-10-12 19:29:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:29:01,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:01,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:01,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:29:01,567 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:01,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1845326203, now seen corresponding path program 1 times [2020-10-12 19:29:01,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:01,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409472681] [2020-10-12 19:29:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:02,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:06,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:29:06,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:06,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:06,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:06,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:06,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:06,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:29:06,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:06,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:06,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:06,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409472681] [2020-10-12 19:29:06,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:06,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:29:06,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248156042] [2020-10-12 19:29:06,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:29:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:29:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:06,853 INFO L87 Difference]: Start difference. First operand 1095 states and 1579 transitions. Second operand 12 states. [2020-10-12 19:29:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:09,594 INFO L93 Difference]: Finished difference Result 10183 states and 14552 transitions. [2020-10-12 19:29:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 19:29:09,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 19:29:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:09,639 INFO L225 Difference]: With dead ends: 10183 [2020-10-12 19:29:09,640 INFO L226 Difference]: Without dead ends: 9125 [2020-10-12 19:29:09,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 19:29:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2020-10-12 19:29:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 3805. [2020-10-12 19:29:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3805 states. [2020-10-12 19:29:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 5519 transitions. [2020-10-12 19:29:10,177 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 5519 transitions. Word has length 62 [2020-10-12 19:29:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:10,177 INFO L479 AbstractCegarLoop]: Abstraction has 3805 states and 5519 transitions. [2020-10-12 19:29:10,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:29:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 5519 transitions. [2020-10-12 19:29:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:29:10,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:10,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:10,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:29:10,182 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:10,182 INFO L82 PathProgramCache]: Analyzing trace with hash -728310218, now seen corresponding path program 1 times [2020-10-12 19:29:10,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:10,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964322263] [2020-10-12 19:29:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:10,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:11,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:14,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:29:14,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4160 [2020-10-12 19:29:14,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:29:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:29:14,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:14,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:14,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:14,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:14,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:14,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:14,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:14,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:14,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964322263] [2020-10-12 19:29:14,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:14,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:14,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890043977] [2020-10-12 19:29:14,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:29:14,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:29:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:14,749 INFO L87 Difference]: Start difference. First operand 3805 states and 5519 transitions. Second operand 10 states. [2020-10-12 19:29:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:17,458 INFO L93 Difference]: Finished difference Result 14631 states and 20975 transitions. [2020-10-12 19:29:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:29:17,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-12 19:29:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:17,511 INFO L225 Difference]: With dead ends: 14631 [2020-10-12 19:29:17,511 INFO L226 Difference]: Without dead ends: 10863 [2020-10-12 19:29:17,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:29:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2020-10-12 19:29:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 5917. [2020-10-12 19:29:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5917 states. [2020-10-12 19:29:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5917 states to 5917 states and 8561 transitions. [2020-10-12 19:29:18,407 INFO L78 Accepts]: Start accepts. Automaton has 5917 states and 8561 transitions. Word has length 62 [2020-10-12 19:29:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:18,408 INFO L479 AbstractCegarLoop]: Abstraction has 5917 states and 8561 transitions. [2020-10-12 19:29:18,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:29:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5917 states and 8561 transitions. [2020-10-12 19:29:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:29:18,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:18,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:18,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:29:18,412 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 13757174, now seen corresponding path program 1 times [2020-10-12 19:29:18,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:18,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979103263] [2020-10-12 19:29:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:23,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:23,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:29:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:23,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:23,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:23,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:29:23,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:23,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:23,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979103263] [2020-10-12 19:29:23,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:23,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:29:23,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457543037] [2020-10-12 19:29:23,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:29:23,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:29:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:23,679 INFO L87 Difference]: Start difference. First operand 5917 states and 8561 transitions. Second operand 12 states. [2020-10-12 19:29:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:30,064 INFO L93 Difference]: Finished difference Result 48893 states and 69709 transitions. [2020-10-12 19:29:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:29:30,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 19:29:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:30,157 INFO L225 Difference]: With dead ends: 48893 [2020-10-12 19:29:30,157 INFO L226 Difference]: Without dead ends: 44442 [2020-10-12 19:29:30,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:29:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44442 states. [2020-10-12 19:29:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44442 to 21604. [2020-10-12 19:29:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21604 states. [2020-10-12 19:29:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21604 states to 21604 states and 31387 transitions. [2020-10-12 19:29:33,079 INFO L78 Accepts]: Start accepts. Automaton has 21604 states and 31387 transitions. Word has length 62 [2020-10-12 19:29:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:33,079 INFO L479 AbstractCegarLoop]: Abstraction has 21604 states and 31387 transitions. [2020-10-12 19:29:33,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:29:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21604 states and 31387 transitions. [2020-10-12 19:29:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:29:33,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:33,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:33,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:29:33,086 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1786974927, now seen corresponding path program 1 times [2020-10-12 19:29:33,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:33,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857788470] [2020-10-12 19:29:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:33,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4063 [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:29:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 19:29:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:37,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:37,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:37,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:37,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:37,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:37,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:29:37,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:37,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:37,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857788470] [2020-10-12 19:29:37,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:37,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:37,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316548394] [2020-10-12 19:29:37,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:29:37,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:37,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:29:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:37,384 INFO L87 Difference]: Start difference. First operand 21604 states and 31387 transitions. Second operand 10 states. [2020-10-12 19:29:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:44,923 INFO L93 Difference]: Finished difference Result 69748 states and 100795 transitions. [2020-10-12 19:29:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 19:29:44,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-12 19:29:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:45,072 INFO L225 Difference]: With dead ends: 69748 [2020-10-12 19:29:45,072 INFO L226 Difference]: Without dead ends: 54754 [2020-10-12 19:29:45,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:29:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54754 states. [2020-10-12 19:29:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54754 to 33030. [2020-10-12 19:29:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33030 states. [2020-10-12 19:29:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33030 states to 33030 states and 47851 transitions. [2020-10-12 19:29:49,906 INFO L78 Accepts]: Start accepts. Automaton has 33030 states and 47851 transitions. Word has length 62 [2020-10-12 19:29:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:49,906 INFO L479 AbstractCegarLoop]: Abstraction has 33030 states and 47851 transitions. [2020-10-12 19:29:49,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:29:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33030 states and 47851 transitions. [2020-10-12 19:29:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:29:49,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:49,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-12 19:29:49,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:29:49,912 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1110695348, now seen corresponding path program 1 times [2020-10-12 19:29:49,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:49,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410704396] [2020-10-12 19:29:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:49,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:50,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:50,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:29:51,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:29:51,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:51,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:51,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:51,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:51,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410704396] [2020-10-12 19:29:51,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:51,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:29:51,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922138441] [2020-10-12 19:29:51,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:29:51,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:29:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:29:51,166 INFO L87 Difference]: Start difference. First operand 33030 states and 47851 transitions. Second operand 6 states. [2020-10-12 19:29:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:57,581 INFO L93 Difference]: Finished difference Result 61292 states and 89793 transitions. [2020-10-12 19:29:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:29:57,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-12 19:29:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:57,673 INFO L225 Difference]: With dead ends: 61292 [2020-10-12 19:29:57,674 INFO L226 Difference]: Without dead ends: 46074 [2020-10-12 19:29:57,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:29:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46074 states. [2020-10-12 19:30:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46074 to 46068. [2020-10-12 19:30:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46068 states. [2020-10-12 19:30:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46068 states to 46068 states and 66521 transitions. [2020-10-12 19:30:03,646 INFO L78 Accepts]: Start accepts. Automaton has 46068 states and 66521 transitions. Word has length 62 [2020-10-12 19:30:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:03,647 INFO L479 AbstractCegarLoop]: Abstraction has 46068 states and 66521 transitions. [2020-10-12 19:30:03,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46068 states and 66521 transitions. [2020-10-12 19:30:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:30:03,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:03,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:03,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:30:03,652 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash 77363362, now seen corresponding path program 1 times [2020-10-12 19:30:03,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:03,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907264835] [2020-10-12 19:30:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:03,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:07,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:08,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:30:08,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:30:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:30:08,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:30:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:30:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:08,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:08,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:08,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:08,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:30:08,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:08,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:08,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907264835] [2020-10-12 19:30:08,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:08,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:30:08,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885477389] [2020-10-12 19:30:08,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:30:08,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:30:08,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:30:08,867 INFO L87 Difference]: Start difference. First operand 46068 states and 66521 transitions. Second operand 12 states. [2020-10-12 19:30:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:56,282 INFO L93 Difference]: Finished difference Result 372002 states and 532827 transitions. [2020-10-12 19:30:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 19:30:56,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 19:30:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:56,776 INFO L225 Difference]: With dead ends: 372002 [2020-10-12 19:30:56,776 INFO L226 Difference]: Without dead ends: 325966 [2020-10-12 19:30:56,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 19:30:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325966 states. [2020-10-12 19:31:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325966 to 130065. [2020-10-12 19:31:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130065 states. [2020-10-12 19:31:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130065 states to 130065 states and 185773 transitions. [2020-10-12 19:31:18,273 INFO L78 Accepts]: Start accepts. Automaton has 130065 states and 185773 transitions. Word has length 62 [2020-10-12 19:31:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:18,274 INFO L479 AbstractCegarLoop]: Abstraction has 130065 states and 185773 transitions. [2020-10-12 19:31:18,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:31:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 130065 states and 185773 transitions. [2020-10-12 19:31:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:31:18,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:18,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:18,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:31:18,284 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1928007645, now seen corresponding path program 1 times [2020-10-12 19:31:18,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:18,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36443354] [2020-10-12 19:31:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3446 [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:21,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:31:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:31:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:22,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:22,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:22,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:22,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:22,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36443354] [2020-10-12 19:31:22,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:22,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:31:22,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115652899] [2020-10-12 19:31:22,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:31:22,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:31:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:22,055 INFO L87 Difference]: Start difference. First operand 130065 states and 185773 transitions. Second operand 10 states. [2020-10-12 19:32:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:13,289 INFO L93 Difference]: Finished difference Result 414192 states and 583735 transitions. [2020-10-12 19:32:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:32:13,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-12 19:32:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:13,649 INFO L225 Difference]: With dead ends: 414192 [2020-10-12 19:32:13,649 INFO L226 Difference]: Without dead ends: 284168 [2020-10-12 19:32:13,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:32:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284168 states.