/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:40:45,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:40:45,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:40:46,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:40:46,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:40:46,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:40:46,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:40:46,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:40:46,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:40:46,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:40:46,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:40:46,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:40:46,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:40:46,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:40:46,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:40:46,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:40:46,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:40:46,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:40:46,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:40:46,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:40:46,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:40:46,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:40:46,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:40:46,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:40:46,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:40:46,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:40:46,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:40:46,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:40:46,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:40:46,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:40:46,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:40:46,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:40:46,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:40:46,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:40:46,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:40:46,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:40:46,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:40:46,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:40:46,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:40:46,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:40:46,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:40:46,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:40:46,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:40:46,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:40:46,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:40:46,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:40:46,133 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:40:46,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:40:46,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:40:46,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:40:46,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:40:46,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:40:46,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:40:46,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:40:46,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:40:46,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:40:46,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:40:46,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:40:46,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:40:46,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:40:46,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:40:46,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:40:46,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:40:46,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:40:46,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:40:46,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:40:46,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:40:46,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:40:46,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:40:46,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:40:46,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:40:46,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:40:46,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:40:46,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:40:46,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:40:46,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:40:46,659 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:40:46,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 20:40:46,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/963b35a33/62a1412196ff410a8ce33e8c928ce057/FLAG0ec49ca7b [2020-09-24 20:40:47,297 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:40:47,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 20:40:47,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/963b35a33/62a1412196ff410a8ce33e8c928ce057/FLAG0ec49ca7b [2020-09-24 20:40:47,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/963b35a33/62a1412196ff410a8ce33e8c928ce057 [2020-09-24 20:40:47,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:40:47,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:40:47,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:47,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:40:47,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:40:47,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:47" (1/1) ... [2020-09-24 20:40:47,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d863eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:47, skipping insertion in model container [2020-09-24 20:40:47,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:40:47" (1/1) ... [2020-09-24 20:40:47,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:40:47,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:40:47,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:47,991 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:40:48,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:40:48,036 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:40:48,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48 WrapperNode [2020-09-24 20:40:48,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:40:48,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:40:48,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:40:48,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:40:48,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... [2020-09-24 20:40:48,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:40:48,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:40:48,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:40:48,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:40:48,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:40:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:40:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:40:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:40:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 20:40:48,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:40:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:40:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:40:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:40:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:40:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:40:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 20:40:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:40:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:40:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 20:40:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:40:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:40:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:40:48,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:40:48,644 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 20:40:48,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:48 BoogieIcfgContainer [2020-09-24 20:40:48,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:40:48,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:40:48,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:40:48,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:40:48,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:40:47" (1/3) ... [2020-09-24 20:40:48,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a053bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:48, skipping insertion in model container [2020-09-24 20:40:48,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:40:48" (2/3) ... [2020-09-24 20:40:48,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a053bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:40:48, skipping insertion in model container [2020-09-24 20:40:48,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:40:48" (3/3) ... [2020-09-24 20:40:48,660 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 20:40:48,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:40:48,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:40:48,703 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:40:48,732 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:40:48,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:40:48,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:40:48,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:40:48,733 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:40:48,733 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:40:48,733 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:40:48,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:40:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 20:40:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 20:40:48,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:48,765 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] [2020-09-24 20:40:48,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 20:40:48,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:48,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656581787] [2020-09-24 20:40:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:48,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:49,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:40:49,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-09-24 20:40:49,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:40:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 20:40:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 20:40:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:40:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:49,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:49,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:49,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 20:40:49,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:49,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:49,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:49,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:40:49,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 20:40:49,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:40:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:49,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:40:49,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656581787] [2020-09-24 20:40:49,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:40:49,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:40:49,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547653635] [2020-09-24 20:40:49,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:40:49,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:40:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:40:49,482 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-24 20:40:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:49,763 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-24 20:40:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:40:49,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-24 20:40:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:49,781 INFO L225 Difference]: With dead ends: 109 [2020-09-24 20:40:49,782 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 20:40:49,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:40:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 20:40:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-24 20:40:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 20:40:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 20:40:49,848 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 20:40:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:49,849 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 20:40:49,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:40:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 20:40:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 20:40:49,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:49,851 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] [2020-09-24 20:40:49,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:40:49,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-24 20:40:49,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:49,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755850704] [2020-09-24 20:40:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:49,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:50,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:40:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1819 [2020-09-24 20:40:51,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 20:40:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:40:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:51,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:51,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:51,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:51,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:51,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:40:51,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:40:51,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:51,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:40:51,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:40:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 20:40:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:40:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:40:51,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:40:52,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755850704] [2020-09-24 20:40:52,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:52,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:40:52,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146681843] [2020-09-24 20:40:52,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:40:52,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:40:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:40:52,016 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-24 20:40:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:52,915 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-24 20:40:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 20:40:52,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-24 20:40:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:52,918 INFO L225 Difference]: With dead ends: 128 [2020-09-24 20:40:52,918 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 20:40:52,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:40:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 20:40:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-24 20:40:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 20:40:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-24 20:40:52,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-24 20:40:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:52,935 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-24 20:40:52,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:40:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-24 20:40:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 20:40:52,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:52,937 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] [2020-09-24 20:40:52,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:40:52,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash -253984627, now seen corresponding path program 1 times [2020-09-24 20:40:52,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:52,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167084465] [2020-09-24 20:40:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:53,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:54,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 20:40:54,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:54,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-09-24 20:40:54,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:54,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:40:54,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:40:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 20:40:54,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:54,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:54,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:54,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:40:54,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:54,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:54,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:54,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:54,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:54,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:40:54,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:54,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 20:40:54,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:40:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 20:40:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:40:54,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167084465] [2020-09-24 20:40:54,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:54,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:40:54,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829640996] [2020-09-24 20:40:54,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:40:54,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:40:54,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:40:54,752 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 9 states. [2020-09-24 20:40:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:55,123 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-09-24 20:40:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:40:55,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-24 20:40:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:55,126 INFO L225 Difference]: With dead ends: 129 [2020-09-24 20:40:55,126 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 20:40:55,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:40:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 20:40:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-09-24 20:40:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 20:40:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-24 20:40:55,138 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-24 20:40:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:55,138 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-24 20:40:55,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:40:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-24 20:40:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:40:55,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:55,141 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 20:40:55,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:40:55,141 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 825760649, now seen corresponding path program 2 times [2020-09-24 20:40:55,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:55,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236369990] [2020-09-24 20:40:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:55,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:57,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:57,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:40:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:40:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-09-24 20:40:57,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:40:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 20:40:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:40:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:57,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:57,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:40:57,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:57,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:40:57,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:40:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:40:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:40:57,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:40:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:40:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:40:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:40:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-24 20:40:58,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:40:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:40:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:40:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 20:40:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:40:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:40:58,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236369990] [2020-09-24 20:40:58,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:40:58,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:40:58,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629750178] [2020-09-24 20:40:58,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:40:58,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:40:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:40:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:40:58,286 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-09-24 20:40:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:40:58,714 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-09-24 20:40:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:40:58,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-24 20:40:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:40:58,717 INFO L225 Difference]: With dead ends: 135 [2020-09-24 20:40:58,717 INFO L226 Difference]: Without dead ends: 87 [2020-09-24 20:40:58,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:40:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-24 20:40:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-24 20:40:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-24 20:40:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-09-24 20:40:58,728 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2020-09-24 20:40:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:40:58,728 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-09-24 20:40:58,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:40:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-09-24 20:40:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:40:58,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:40:58,730 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:40:58,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:40:58,731 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:40:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:40:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash 328894853, now seen corresponding path program 3 times [2020-09-24 20:40:58,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:40:58,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596368438] [2020-09-24 20:40:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:40:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:40:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:40:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:02,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:02,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:41:02,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3302 [2020-09-24 20:41:02,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:41:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 20:41:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:02,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:02,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:02,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:02,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:41:02,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:02,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:02,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:02,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:02,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:02,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:02,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 20:41:02,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:02,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-09-24 20:41:02,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:41:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:41:02,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:02,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596368438] [2020-09-24 20:41:02,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:02,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:41:02,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016717988] [2020-09-24 20:41:02,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:41:02,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:41:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:41:02,441 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 13 states. [2020-09-24 20:41:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:02,948 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-09-24 20:41:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:41:02,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-24 20:41:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:02,950 INFO L225 Difference]: With dead ends: 141 [2020-09-24 20:41:02,950 INFO L226 Difference]: Without dead ends: 93 [2020-09-24 20:41:02,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:41:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-24 20:41:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-09-24 20:41:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-24 20:41:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-09-24 20:41:02,973 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 55 [2020-09-24 20:41:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:02,977 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-09-24 20:41:02,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:41:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-09-24 20:41:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 20:41:02,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:02,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:02,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:41:02,983 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1046055553, now seen corresponding path program 4 times [2020-09-24 20:41:02,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:02,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477456280] [2020-09-24 20:41:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:06,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:06,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 20:41:06,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:06,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3881 [2020-09-24 20:41:06,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:41:06,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:06,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:41:06,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:06,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:06,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:06,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:06,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:06,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:06,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:06,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:06,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:06,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:06,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:07,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:07,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 20:41:07,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-09-24 20:41:07,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:41:07,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:07,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 20:41:07,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:07,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477456280] [2020-09-24 20:41:07,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:07,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:41:07,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497235969] [2020-09-24 20:41:07,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:41:07,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:07,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:41:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:41:07,400 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 15 states. [2020-09-24 20:41:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:07,969 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-09-24 20:41:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 20:41:07,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-24 20:41:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:07,971 INFO L225 Difference]: With dead ends: 147 [2020-09-24 20:41:07,971 INFO L226 Difference]: Without dead ends: 99 [2020-09-24 20:41:07,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 20:41:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-24 20:41:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-24 20:41:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 20:41:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-09-24 20:41:07,981 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2020-09-24 20:41:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:07,982 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-09-24 20:41:07,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:41:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-09-24 20:41:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 20:41:07,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:07,984 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:07,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:41:07,984 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash 813358717, now seen corresponding path program 5 times [2020-09-24 20:41:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:07,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788302879] [2020-09-24 20:41:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:08,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:08,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:12,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:12,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 20:41:12,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:12,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4596 [2020-09-24 20:41:12,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:12,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:41:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 20:41:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:12,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:12,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:12,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:12,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:12,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:12,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:41:12,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:13,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:13,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 20:41:13,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:13,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-24 20:41:13,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:41:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:13,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 20:41:13,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:13,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788302879] [2020-09-24 20:41:13,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:13,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 20:41:13,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588276759] [2020-09-24 20:41:13,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 20:41:13,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 20:41:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:41:13,260 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 17 states. [2020-09-24 20:41:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:14,008 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-09-24 20:41:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 20:41:14,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-09-24 20:41:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:14,010 INFO L225 Difference]: With dead ends: 153 [2020-09-24 20:41:14,010 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 20:41:14,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 20:41:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 20:41:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-09-24 20:41:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 20:41:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-09-24 20:41:14,034 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 67 [2020-09-24 20:41:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:14,035 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-09-24 20:41:14,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 20:41:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-09-24 20:41:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 20:41:14,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:14,036 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:14,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:41:14,038 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -38517383, now seen corresponding path program 6 times [2020-09-24 20:41:14,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:14,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469507438] [2020-09-24 20:41:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:17,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:17,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 20:41:17,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3905 [2020-09-24 20:41:17,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:41:17,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:17,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:41:17,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:18,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:18,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:18,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:18,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:18,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:18,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:18,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:18,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:18,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:18,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 20:41:18,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 20:41:18,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:18,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469507438] [2020-09-24 20:41:18,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:18,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 20:41:18,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672760063] [2020-09-24 20:41:18,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 20:41:18,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 20:41:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:41:18,795 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 19 states. [2020-09-24 20:41:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:19,726 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-24 20:41:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 20:41:19,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-09-24 20:41:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:19,729 INFO L225 Difference]: With dead ends: 159 [2020-09-24 20:41:19,729 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 20:41:19,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 20:41:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 20:41:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-09-24 20:41:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 20:41:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-09-24 20:41:19,738 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 73 [2020-09-24 20:41:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:19,739 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-09-24 20:41:19,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 20:41:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-09-24 20:41:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 20:41:19,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:19,741 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:19,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:41:19,741 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 174817141, now seen corresponding path program 7 times [2020-09-24 20:41:19,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:19,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162269059] [2020-09-24 20:41:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:24,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 20:41:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:24,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 20:41:24,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:24,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:24,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:25,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:25,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 20:41:25,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-09-24 20:41:25,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 20:41:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:25,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 20:41:25,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:25,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162269059] [2020-09-24 20:41:25,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:25,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 20:41:25,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512657997] [2020-09-24 20:41:25,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 20:41:25,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 20:41:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:41:25,705 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 21 states. [2020-09-24 20:41:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:26,902 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-09-24 20:41:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 20:41:26,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-09-24 20:41:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:26,905 INFO L225 Difference]: With dead ends: 165 [2020-09-24 20:41:26,905 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 20:41:26,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 20:41:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 20:41:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-09-24 20:41:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 20:41:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-24 20:41:26,914 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 79 [2020-09-24 20:41:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:26,914 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-24 20:41:26,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 20:41:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-24 20:41:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 20:41:26,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:26,916 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:26,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:41:26,916 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -944354191, now seen corresponding path program 8 times [2020-09-24 20:41:26,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:26,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749882240] [2020-09-24 20:41:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:26,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:31,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 20:41:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:31,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:31,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:31,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:41:31,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:31,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:31,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:31,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:31,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 20:41:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 20:41:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:33,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749882240] [2020-09-24 20:41:33,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:33,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 20:41:33,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222074147] [2020-09-24 20:41:33,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 20:41:33,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 20:41:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:41:33,665 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 23 states. [2020-09-24 20:41:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:34,838 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-09-24 20:41:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 20:41:34,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-09-24 20:41:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:34,841 INFO L225 Difference]: With dead ends: 171 [2020-09-24 20:41:34,841 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 20:41:34,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 20:41:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 20:41:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-09-24 20:41:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-24 20:41:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-09-24 20:41:34,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 85 [2020-09-24 20:41:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:34,849 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-09-24 20:41:34,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 20:41:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-09-24 20:41:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 20:41:34,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:34,851 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:34,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:41:34,851 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1868196973, now seen corresponding path program 9 times [2020-09-24 20:41:34,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:34,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486551931] [2020-09-24 20:41:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:34,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:34,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:39,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 20:41:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:41:39,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 20:41:39,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:39,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:39,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:39,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:39,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:41:39,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:39,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:39,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:39,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:41:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:40,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 20:41:40,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 20:41:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:41,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486551931] [2020-09-24 20:41:41,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:41,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 20:41:41,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358237348] [2020-09-24 20:41:41,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 20:41:41,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 20:41:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-24 20:41:41,217 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 25 states.