/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:06:59,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:06:59,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:06:59,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:06:59,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:06:59,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:06:59,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:06:59,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:06:59,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:06:59,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:06:59,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:06:59,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:06:59,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:06:59,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:06:59,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:06:59,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:06:59,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:06:59,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:06:59,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:06:59,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:06:59,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:06:59,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:06:59,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:06:59,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:06:59,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:06:59,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:06:59,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:06:59,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:06:59,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:06:59,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:06:59,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:06:59,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:06:59,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:06:59,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:06:59,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:06:59,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:06:59,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:06:59,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:06:59,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:06:59,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:06:59,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:06:59,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:06:59,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:06:59,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:06:59,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:06:59,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:06:59,179 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:06:59,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:06:59,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:06:59,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:06:59,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:06:59,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:06:59,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:06:59,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:06:59,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:06:59,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:06:59,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:06:59,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:06:59,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:06:59,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:06:59,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:06:59,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:06:59,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:06:59,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:06:59,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:06:59,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:06:59,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:06:59,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:06:59,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:06:59,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:06:59,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:06:59,498 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:06:59,499 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-12 10:06:59,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40c5680a0/34dd4a50f91747a09690d602d7db4b17/FLAG35369a2d6 [2020-10-12 10:07:00,002 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:07:00,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-12 10:07:00,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40c5680a0/34dd4a50f91747a09690d602d7db4b17/FLAG35369a2d6 [2020-10-12 10:07:00,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40c5680a0/34dd4a50f91747a09690d602d7db4b17 [2020-10-12 10:07:00,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:07:00,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:07:00,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:00,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:07:00,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:07:00,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194bd3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00, skipping insertion in model container [2020-10-12 10:07:00,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:07:00,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:07:00,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:00,631 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:07:00,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:00,669 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:07:00,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00 WrapperNode [2020-10-12 10:07:00,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:00,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:07:00,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:07:00,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:07:00,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... [2020-10-12 10:07:00,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:07:00,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:07:00,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:07:00,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:07:00,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:07:00,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:07:00,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:07:00,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:07:00,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:07:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:07:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:07:00,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:07:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:07:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:07:01,088 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:07:01,089 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:07:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:01 BoogieIcfgContainer [2020-10-12 10:07:01,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:07:01,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:07:01,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:07:01,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:07:01,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:07:00" (1/3) ... [2020-10-12 10:07:01,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4828f990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:01, skipping insertion in model container [2020-10-12 10:07:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:00" (2/3) ... [2020-10-12 10:07:01,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4828f990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:01, skipping insertion in model container [2020-10-12 10:07:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:01" (3/3) ... [2020-10-12 10:07:01,102 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2020-10-12 10:07:01,120 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:07:01,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:07:01,146 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:07:01,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:07:01,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:07:01,178 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:07:01,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:07:01,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:07:01,182 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:07:01,182 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:07:01,182 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:07:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 10:07:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:07:01,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:01,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:01,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:01,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-12 10:07:01,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:01,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629475793] [2020-10-12 10:07:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:07:01,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-12 10:07:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 10:07:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:07:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 10:07:01,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:01,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:01,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:01,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:01,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:07:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629475793] [2020-10-12 10:07:01,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:07:01,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:07:01,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610527559] [2020-10-12 10:07:01,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:07:01,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:07:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:07:01,787 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-12 10:07:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:01,914 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2020-10-12 10:07:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:07:01,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 10:07:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:01,927 INFO L225 Difference]: With dead ends: 46 [2020-10-12 10:07:01,928 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 10:07:01,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:07:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 10:07:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-12 10:07:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:07:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 10:07:01,985 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-12 10:07:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:01,985 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 10:07:01,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:07:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 10:07:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:07:01,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:01,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:01,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:07:01,988 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-12 10:07:01,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:01,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176302772] [2020-10-12 10:07:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:07:02,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:02,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-12 10:07:02,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:07:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:02,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:07:02,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:02,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:02,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:02,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:02,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:02,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:07:02,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176302772] [2020-10-12 10:07:02,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:02,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:07:02,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140890487] [2020-10-12 10:07:02,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:07:02,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:07:02,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:02,955 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-12 10:07:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:03,156 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-12 10:07:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:07:03,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-12 10:07:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:03,158 INFO L225 Difference]: With dead ends: 35 [2020-10-12 10:07:03,159 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:07:03,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:07:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-12 10:07:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:07:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 10:07:03,170 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 17 [2020-10-12 10:07:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:03,171 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 10:07:03,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:07:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 10:07:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 10:07:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:03,172 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:03,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:07:03,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 334778154, now seen corresponding path program 2 times [2020-10-12 10:07:03,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:03,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559684627] [2020-10-12 10:07:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 10:07:03,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:03,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-12 10:07:03,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:07:03,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:03,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:07:03,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:03,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:03,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:03,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:03,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:03,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:03,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:03,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:03,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:07:03,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559684627] [2020-10-12 10:07:03,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:03,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:07:03,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526865246] [2020-10-12 10:07:03,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:07:03,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:07:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:07:03,836 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2020-10-12 10:07:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:04,273 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-12 10:07:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:04,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-12 10:07:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:04,281 INFO L225 Difference]: With dead ends: 47 [2020-10-12 10:07:04,281 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:07:04,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:07:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2020-10-12 10:07:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:07:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-12 10:07:04,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-12 10:07:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:04,314 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-12 10:07:04,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:07:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-12 10:07:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:07:04,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:04,317 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:04,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:07:04,318 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash -329672603, now seen corresponding path program 3 times [2020-10-12 10:07:04,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:04,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874577681] [2020-10-12 10:07:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:04,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 10:07:05,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-12 10:07:05,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:07:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:07:05,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:05,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:05,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:05,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:07:05,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:05,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:05,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:05,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 10:07:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:07:05,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874577681] [2020-10-12 10:07:05,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:05,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:07:05,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126984610] [2020-10-12 10:07:05,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:07:05,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:07:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:05,312 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-12 10:07:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:05,650 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-12 10:07:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:07:05,650 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-12 10:07:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:05,655 INFO L225 Difference]: With dead ends: 39 [2020-10-12 10:07:05,655 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:07:05,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:07:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-10-12 10:07:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 10:07:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 10:07:05,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-12 10:07:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:05,666 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 10:07:05,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:07:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 10:07:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:07:05,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:05,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:05,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:07:05,668 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash 956525676, now seen corresponding path program 1 times [2020-10-12 10:07:05,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:05,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745739744] [2020-10-12 10:07:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:07:05,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:05,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-12 10:07:05,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:07:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 10:07:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 10:07:05,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:05,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:05,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:05,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:05,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:05,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:07:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:05,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:05,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:05,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:05,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:05,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:07:05,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745739744] [2020-10-12 10:07:05,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:05,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 10:07:05,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674377719] [2020-10-12 10:07:05,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:07:05,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:07:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:07:05,940 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-12 10:07:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:06,042 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-12 10:07:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:07:06,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-12 10:07:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:06,044 INFO L225 Difference]: With dead ends: 52 [2020-10-12 10:07:06,044 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:07:06,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:07:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:07:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-12 10:07:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:07:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 10:07:06,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-12 10:07:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:06,053 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 10:07:06,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:07:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 10:07:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:07:06,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:06,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:06,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:07:06,055 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1983526027, now seen corresponding path program 2 times [2020-10-12 10:07:06,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:06,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800125131] [2020-10-12 10:07:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:07:06,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:06,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-12 10:07:06,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:07:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:07:06,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:06,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:06,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:06,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:06,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:06,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:06,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:06,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:07:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:06,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:06,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:06,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:06,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:06,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:07:06,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:06,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:06,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:06,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:07:06,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800125131] [2020-10-12 10:07:06,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:06,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:07:06,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623240658] [2020-10-12 10:07:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:07:06,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:07:06,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:06,831 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-10-12 10:07:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:07,152 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-12 10:07:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:07:07,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-12 10:07:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:07,154 INFO L225 Difference]: With dead ends: 46 [2020-10-12 10:07:07,154 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 10:07:07,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:07:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 10:07:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-12 10:07:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:07:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-12 10:07:07,166 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2020-10-12 10:07:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:07,167 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-12 10:07:07,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:07:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-12 10:07:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:07:07,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:07,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:07,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:07:07,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1287661272, now seen corresponding path program 3 times [2020-10-12 10:07:07,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:07,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380740229] [2020-10-12 10:07:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:07,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:07:07,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:07,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-12 10:07:07,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:07:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:07:07,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:08,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:08,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:08,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:08,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:08,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:08,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:08,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:08,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:08,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 10:07:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:08,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:08,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:08,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:08,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:07:08,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:08,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:08,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:07:08,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380740229] [2020-10-12 10:07:08,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:08,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:07:08,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662273976] [2020-10-12 10:07:08,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:07:08,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:08,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:07:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:07:08,218 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-10-12 10:07:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:08,814 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-12 10:07:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:08,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 10:07:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:08,819 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:07:08,820 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:07:08,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:07:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:07:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-12 10:07:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:07:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 10:07:08,847 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 27 [2020-10-12 10:07:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:08,850 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 10:07:08,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:07:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 10:07:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:07:08,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:08,854 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:08,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:07:08,854 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash 384747563, now seen corresponding path program 4 times [2020-10-12 10:07:08,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:08,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051465672] [2020-10-12 10:07:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:08,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:09,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:07:10,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-12 10:07:10,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:07:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:07:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:10,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:10,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:07:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:10,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:10,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:10,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:10,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:10,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:10,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:07:10,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051465672] [2020-10-12 10:07:10,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:10,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:07:10,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267809345] [2020-10-12 10:07:10,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:07:10,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:07:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:10,302 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2020-10-12 10:07:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:10,596 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-12 10:07:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:10,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 10:07:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:10,598 INFO L225 Difference]: With dead ends: 51 [2020-10-12 10:07:10,598 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:07:10,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:07:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-12 10:07:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:07:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 10:07:10,619 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-12 10:07:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:10,619 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 10:07:10,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:07:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 10:07:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:07:10,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:10,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:10,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:07:10,622 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1993467674, now seen corresponding path program 5 times [2020-10-12 10:07:10,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:10,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131115057] [2020-10-12 10:07:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:07:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:11,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-12 10:07:11,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:07:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:07:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:11,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:11,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:07:11,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:07:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:11,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:11,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:11,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 10:07:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:11,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:11,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:11,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:11,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131115057] [2020-10-12 10:07:11,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:11,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:07:11,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249256916] [2020-10-12 10:07:11,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:07:11,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:07:11,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:07:11,071 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-10-12 10:07:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:11,136 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-12 10:07:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:07:11,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-12 10:07:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:11,138 INFO L225 Difference]: With dead ends: 64 [2020-10-12 10:07:11,138 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:07:11,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:07:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:07:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 10:07:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:07:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 10:07:11,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-12 10:07:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:11,148 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 10:07:11,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:07:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 10:07:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:07:11,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:11,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:11,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:07:11,151 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1864152054, now seen corresponding path program 6 times [2020-10-12 10:07:11,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:11,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161130622] [2020-10-12 10:07:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:07:11,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:11,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 10:07:11,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:07:11,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:11,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 10:07:11,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:11,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:11,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:11,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 10:07:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:11,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:07:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:11,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:11,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:11,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:11,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161130622] [2020-10-12 10:07:11,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:11,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 10:07:11,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512755828] [2020-10-12 10:07:11,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:07:11,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:07:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:07:11,576 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-10-12 10:07:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:11,646 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-12 10:07:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:07:11,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-12 10:07:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:11,647 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:07:11,648 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 10:07:11,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:07:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 10:07:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 10:07:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:07:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 10:07:11,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-12 10:07:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:11,661 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 10:07:11,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:07:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 10:07:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:07:11,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:11,665 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:11,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:07:11,666 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2144632166, now seen corresponding path program 7 times [2020-10-12 10:07:11,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:11,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511529424] [2020-10-12 10:07:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:11,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:11,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:07:12,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:12,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-12 10:07:12,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:07:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:12,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:12,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:12,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:12,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:07:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:12,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:07:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:12,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:12,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:12,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:12,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:12,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:12,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:12,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511529424] [2020-10-12 10:07:12,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:12,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:07:12,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569111995] [2020-10-12 10:07:12,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:07:12,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:07:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:07:12,298 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-12 10:07:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:12,380 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-12 10:07:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:07:12,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-12 10:07:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:12,381 INFO L225 Difference]: With dead ends: 66 [2020-10-12 10:07:12,381 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:07:12,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:07:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:07:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 10:07:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:07:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 10:07:12,389 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-10-12 10:07:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:12,389 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 10:07:12,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:07:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 10:07:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:07:12,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:12,390 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:12,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:07:12,391 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:12,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1862891402, now seen corresponding path program 8 times [2020-10-12 10:07:12,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:12,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790686891] [2020-10-12 10:07:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:12,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:13,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:07:13,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:13,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-12 10:07:13,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:07:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:07:13,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:13,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:13,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:13,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:13,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 10:07:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:13,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:13,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:13,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:07:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:13,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:13,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:13,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:13,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:13,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:13,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:13,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:13,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:13,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790686891] [2020-10-12 10:07:13,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:13,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:07:13,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611380892] [2020-10-12 10:07:13,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:07:13,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:07:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:13,106 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2020-10-12 10:07:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:13,165 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-12 10:07:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:07:13,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-12 10:07:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:13,167 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:07:13,167 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:07:13,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:07:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 10:07:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:07:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 10:07:13,182 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-10-12 10:07:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:13,182 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 10:07:13,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:07:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 10:07:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:07:13,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:13,184 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:13,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:07:13,185 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1718862310, now seen corresponding path program 9 times [2020-10-12 10:07:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:13,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260307212] [2020-10-12 10:07:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:13,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:13,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:07:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-12 10:07:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:07:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:07:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:14,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:14,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 10:07:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:14,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:14,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:14,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 10:07:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:14,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:14,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:14,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:14,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:14,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:14,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260307212] [2020-10-12 10:07:14,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:14,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:07:14,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056872927] [2020-10-12 10:07:14,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:07:14,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:07:14,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:14,045 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-12 10:07:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:14,155 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-12 10:07:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:07:14,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-12 10:07:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:14,157 INFO L225 Difference]: With dead ends: 68 [2020-10-12 10:07:14,157 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:07:14,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:07:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 10:07:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:07:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 10:07:14,166 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-12 10:07:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:14,166 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 10:07:14,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:07:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 10:07:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:07:14,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:14,168 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:14,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:07:14,168 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1548927754, now seen corresponding path program 10 times [2020-10-12 10:07:14,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:14,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418086133] [2020-10-12 10:07:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:14,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:14,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:07:15,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-12 10:07:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:07:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 10:07:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:15,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:15,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:15,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:15,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:15,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:15,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:15,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 10:07:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:15,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:15,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:15,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:15,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:15,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:15,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:15,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:15,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:07:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:15,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:15,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:15,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:15,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:15,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:15,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:15,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:15,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418086133] [2020-10-12 10:07:15,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:15,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:07:15,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890384410] [2020-10-12 10:07:15,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:07:15,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:07:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:07:15,219 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2020-10-12 10:07:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:15,351 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-12 10:07:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:07:15,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-12 10:07:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:15,353 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:07:15,353 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 10:07:15,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:07:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 10:07:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 10:07:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 10:07:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 10:07:15,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-10-12 10:07:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:15,373 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 10:07:15,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:07:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 10:07:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:07:15,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:15,375 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:15,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:07:15,375 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash 575923814, now seen corresponding path program 11 times [2020-10-12 10:07:15,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:15,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427172587] [2020-10-12 10:07:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:15,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:07:16,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:16,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-10-12 10:07:16,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:07:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:16,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:16,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 10:07:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:16,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:16,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:07:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:16,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:16,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:16,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:16,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:16,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:16,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:16,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:16,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427172587] [2020-10-12 10:07:16,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:16,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:07:16,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387427274] [2020-10-12 10:07:16,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:07:16,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:07:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:16,500 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-10-12 10:07:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:16,601 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-12 10:07:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:07:16,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-12 10:07:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:16,603 INFO L225 Difference]: With dead ends: 70 [2020-10-12 10:07:16,603 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 10:07:16,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:07:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 10:07:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 10:07:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:07:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 10:07:16,613 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-10-12 10:07:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:16,613 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 10:07:16,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:07:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 10:07:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:07:16,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:16,614 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:16,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:07:16,614 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash 477572746, now seen corresponding path program 12 times [2020-10-12 10:07:16,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:16,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321758917] [2020-10-12 10:07:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:16,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:16,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:17,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:07:17,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:17,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-12 10:07:17,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:17,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:07:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:17,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:07:17,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:17,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:17,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:17,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:17,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:17,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:17,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:17,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 10:07:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:17,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:17,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:17,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:17,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:17,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:17,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 10:07:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:17,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:17,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:17,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:17,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:17,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:17,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:17,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321758917] [2020-10-12 10:07:17,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:17,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:07:17,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283631834] [2020-10-12 10:07:17,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:07:17,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:07:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:07:17,688 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 13 states. [2020-10-12 10:07:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:17,795 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-12 10:07:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:07:17,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 10:07:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:17,796 INFO L225 Difference]: With dead ends: 72 [2020-10-12 10:07:17,796 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:07:17,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:07:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:07:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-12 10:07:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:07:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 10:07:17,806 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-12 10:07:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:17,806 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 10:07:17,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:07:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 10:07:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:07:17,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:17,807 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:17,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:07:17,808 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1723656934, now seen corresponding path program 13 times [2020-10-12 10:07:17,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:17,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274703852] [2020-10-12 10:07:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:17,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:07:18,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-12 10:07:18,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:07:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:18,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:07:18,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:18,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:18,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:18,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:18,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:07:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:18,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:18,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:07:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:18,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:18,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:18,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:18,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:18,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:18,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274703852] [2020-10-12 10:07:18,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:18,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:07:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947760097] [2020-10-12 10:07:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:07:18,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:07:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:18,997 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2020-10-12 10:07:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:19,126 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-12 10:07:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:07:19,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-12 10:07:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:19,129 INFO L225 Difference]: With dead ends: 73 [2020-10-12 10:07:19,129 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 10:07:19,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:07:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 10:07:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 10:07:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:07:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 10:07:19,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2020-10-12 10:07:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:19,140 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 10:07:19,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:07:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 10:07:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:07:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:19,141 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:19,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:07:19,142 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1697561098, now seen corresponding path program 14 times [2020-10-12 10:07:19,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:19,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534718824] [2020-10-12 10:07:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:20,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:07:20,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:20,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-12 10:07:20,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:07:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:07:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:20,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:20,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:20,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:20,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:07:20,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:07:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:20,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:20,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:20,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:20,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:20,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:20,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 10:07:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:20,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:20,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:20,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:20,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:20,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:20,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:20,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:20,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:20,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:20,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534718824] [2020-10-12 10:07:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:07:20,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139740423] [2020-10-12 10:07:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:07:20,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:07:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:20,627 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-12 10:07:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:20,750 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-12 10:07:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:07:20,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-12 10:07:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:20,751 INFO L225 Difference]: With dead ends: 74 [2020-10-12 10:07:20,752 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:07:20,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:07:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-12 10:07:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 10:07:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 10:07:20,759 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-12 10:07:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:20,759 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 10:07:20,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:07:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 10:07:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:07:20,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:20,760 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:20,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:07:20,760 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 888590182, now seen corresponding path program 15 times [2020-10-12 10:07:20,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:20,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330361465] [2020-10-12 10:07:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:20,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:20,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:22,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:07:22,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1313 [2020-10-12 10:07:22,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:07:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:22,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:07:22,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:22,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:22,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:22,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:22,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:22,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:22,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:22,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:22,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:22,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:07:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:22,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:22,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:22,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:07:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:22,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:22,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:22,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:22,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:22,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:22,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330361465] [2020-10-12 10:07:22,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:22,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:07:22,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112098647] [2020-10-12 10:07:22,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:07:22,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:07:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:22,248 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-12 10:07:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:22,351 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-10-12 10:07:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:07:22,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-12 10:07:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:22,353 INFO L225 Difference]: With dead ends: 75 [2020-10-12 10:07:22,353 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:07:22,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:07:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 10:07:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:07:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 10:07:22,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-12 10:07:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:22,365 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 10:07:22,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:07:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 10:07:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:07:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:22,366 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:22,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:07:22,367 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1580295562, now seen corresponding path program 16 times [2020-10-12 10:07:22,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:22,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108802977] [2020-10-12 10:07:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:22,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:07:23,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:07:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:23,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 10:07:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:23,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:23,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:07:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:23,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:23,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:23,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:23,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:23,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:23,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108802977] [2020-10-12 10:07:23,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:23,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:07:23,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788664834] [2020-10-12 10:07:23,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:07:23,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:07:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:07:23,873 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-12 10:07:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:23,969 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-12 10:07:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:07:23,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-12 10:07:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:23,970 INFO L225 Difference]: With dead ends: 76 [2020-10-12 10:07:23,971 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:07:23,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:07:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:07:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-12 10:07:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 10:07:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 10:07:23,980 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-12 10:07:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:23,980 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 10:07:23,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:07:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 10:07:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:07:23,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:23,981 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:23,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:07:23,982 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1548325862, now seen corresponding path program 17 times [2020-10-12 10:07:23,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:23,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227304604] [2020-10-12 10:07:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:24,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:25,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:25,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:07:25,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:25,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-12 10:07:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:07:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:25,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:07:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:25,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:25,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:25,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:25,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:25,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:25,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:25,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:25,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:25,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:07:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:25,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:25,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:25,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:25,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:25,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:25,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:07:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:25,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:25,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:25,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:25,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:25,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227304604] [2020-10-12 10:07:25,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:25,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:07:25,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667760320] [2020-10-12 10:07:25,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:07:25,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:07:25,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:25,489 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-12 10:07:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:25,588 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-12 10:07:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:07:25,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-12 10:07:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:25,590 INFO L225 Difference]: With dead ends: 77 [2020-10-12 10:07:25,590 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 10:07:25,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 10:07:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 10:07:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:07:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 10:07:25,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2020-10-12 10:07:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:25,597 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 10:07:25,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:07:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 10:07:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:07:25,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:25,598 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:25,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:07:25,598 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 557265162, now seen corresponding path program 18 times [2020-10-12 10:07:25,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:25,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579255475] [2020-10-12 10:07:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:07:27,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:07:27,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:27,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:27,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:07:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:27,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:07:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:27,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:27,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:27,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:27,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579255475] [2020-10-12 10:07:27,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:27,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:07:27,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189794784] [2020-10-12 10:07:27,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:07:27,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:07:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:07:27,231 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-12 10:07:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:27,364 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-12 10:07:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:07:27,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 10:07:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:27,367 INFO L225 Difference]: With dead ends: 78 [2020-10-12 10:07:27,367 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:07:27,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:07:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:07:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-12 10:07:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:07:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-12 10:07:27,384 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-12 10:07:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:27,384 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-12 10:07:27,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:07:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-12 10:07:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:07:27,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:27,385 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:27,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:07:27,385 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -100845466, now seen corresponding path program 19 times [2020-10-12 10:07:27,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:27,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032757780] [2020-10-12 10:07:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:27,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:28,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:28,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:07:28,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-12 10:07:28,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:28,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:07:28,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:28,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:07:28,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:28,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:28,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:28,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:28,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:28,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:28,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:28,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:28,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:28,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:28,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:28,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 10:07:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:29,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:29,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:29,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:07:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:29,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:29,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:29,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:29,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:29,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032757780] [2020-10-12 10:07:29,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:29,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:07:29,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732788264] [2020-10-12 10:07:29,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:07:29,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:07:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:29,012 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2020-10-12 10:07:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:29,196 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-12 10:07:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:07:29,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 10:07:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:29,198 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:07:29,198 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 10:07:29,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 10:07:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 10:07:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:07:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 10:07:29,206 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-12 10:07:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:29,206 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 10:07:29,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:07:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 10:07:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:07:29,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:29,207 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:29,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:07:29,207 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 972561546, now seen corresponding path program 20 times [2020-10-12 10:07:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:29,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259552216] [2020-10-12 10:07:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:30,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:30,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:07:30,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:30,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-12 10:07:30,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:07:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:07:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:30,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:31,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:31,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:31,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:07:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:31,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:31,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 10:07:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:31,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:31,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:31,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:31,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:31,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:31,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:07:31,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259552216] [2020-10-12 10:07:31,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:31,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:07:31,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725525384] [2020-10-12 10:07:31,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:07:31,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:07:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:07:31,027 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2020-10-12 10:07:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:31,216 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-12 10:07:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:07:31,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-12 10:07:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:31,218 INFO L225 Difference]: With dead ends: 84 [2020-10-12 10:07:31,218 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:07:31,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:07:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:07:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-12 10:07:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:07:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 10:07:31,232 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-10-12 10:07:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:31,233 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 10:07:31,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:07:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 10:07:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:07:31,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:31,240 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:31,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:07:31,244 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash 396973481, now seen corresponding path program 21 times [2020-10-12 10:07:31,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:31,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664052659] [2020-10-12 10:07:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:07:35,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3832 [2020-10-12 10:07:35,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:07:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:07:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:35,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:07:35,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:35,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:07:35,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:07:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:35,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:35,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:35,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:07:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:35,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:35,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:35,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:35,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664052659] [2020-10-12 10:07:35,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:35,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:07:35,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189924562] [2020-10-12 10:07:35,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:07:35,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:07:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:07:35,452 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-12 10:07:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:35,605 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-10-12 10:07:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:07:35,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-12 10:07:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:35,606 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:07:35,606 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:07:35,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:07:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:07:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-12 10:07:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:07:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 10:07:35,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-12 10:07:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:35,621 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 10:07:35,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:07:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 10:07:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:07:35,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:35,622 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:35,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:07:35,623 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2061218043, now seen corresponding path program 22 times [2020-10-12 10:07:35,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:35,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43794324] [2020-10-12 10:07:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:39,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3607 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:07:39,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:39,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:39,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:39,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:39,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:39,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:39,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:39,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:39,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:39,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:39,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:39,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:07:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:39,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:39,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:39,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:07:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:39,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:39,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:39,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:39,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:39,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:39,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:39,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43794324] [2020-10-12 10:07:39,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:39,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:07:39,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875823075] [2020-10-12 10:07:39,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:07:39,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:39,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:07:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:07:39,545 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 23 states. [2020-10-12 10:07:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:39,739 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-12 10:07:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:07:39,740 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-12 10:07:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:39,741 INFO L225 Difference]: With dead ends: 87 [2020-10-12 10:07:39,741 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:07:39,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:07:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:07:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-12 10:07:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:07:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 10:07:39,750 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-12 10:07:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:39,750 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 10:07:39,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:07:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 10:07:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:07:39,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:39,751 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:39,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:07:39,752 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash -955743959, now seen corresponding path program 23 times [2020-10-12 10:07:39,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:39,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145088931] [2020-10-12 10:07:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4060 [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:07:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:07:43,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:44,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:44,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:44,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:07:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:44,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:44,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:44,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:07:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:44,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:44,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:44,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145088931] [2020-10-12 10:07:44,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:44,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:07:44,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927756622] [2020-10-12 10:07:44,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:07:44,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:44,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:07:44,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:07:44,117 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 24 states. [2020-10-12 10:07:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:44,353 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-12 10:07:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:07:44,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-12 10:07:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:44,354 INFO L225 Difference]: With dead ends: 88 [2020-10-12 10:07:44,354 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 10:07:44,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:07:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 10:07:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-12 10:07:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 10:07:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 10:07:44,365 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-12 10:07:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:44,365 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 10:07:44,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:07:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 10:07:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:07:44,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:44,366 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:44,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:07:44,366 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1045785723, now seen corresponding path program 24 times [2020-10-12 10:07:44,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:44,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372060018] [2020-10-12 10:07:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:46,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:48,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 10:07:48,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:48,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4399 [2020-10-12 10:07:48,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:07:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:07:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:49,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:49,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:49,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 10:07:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:49,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:49,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:49,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:49,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:49,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:49,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:07:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:49,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:49,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:49,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372060018] [2020-10-12 10:07:49,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:49,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:07:49,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647640374] [2020-10-12 10:07:49,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:07:49,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:07:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:07:49,107 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 25 states. [2020-10-12 10:07:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:49,319 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-12 10:07:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:07:49,320 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-12 10:07:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:49,321 INFO L225 Difference]: With dead ends: 89 [2020-10-12 10:07:49,321 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 10:07:49,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:07:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 10:07:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-12 10:07:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:07:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 10:07:49,338 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-12 10:07:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:49,339 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 10:07:49,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:07:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 10:07:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:07:49,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:49,341 INFO L422 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:49,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:07:49,341 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:49,342 INFO L82 PathProgramCache]: Analyzing trace with hash 457886889, now seen corresponding path program 25 times [2020-10-12 10:07:49,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:49,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617285763] [2020-10-12 10:07:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:54,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:07:54,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:54,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:54,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:54,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:54,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:54,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:07:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:54,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:54,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:07:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:54,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:54,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:54,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:07:54,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:07:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:54,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:07:54,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617285763] [2020-10-12 10:07:54,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:54,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:07:54,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732078612] [2020-10-12 10:07:54,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:07:54,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:07:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:07:54,706 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 26 states. [2020-10-12 10:07:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:54,879 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-10-12 10:07:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:07:54,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-12 10:07:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:54,880 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:07:54,881 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:07:54,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:07:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:07:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-12 10:07:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:07:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 10:07:54,893 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-12 10:07:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:54,894 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 10:07:54,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:07:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 10:07:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:07:54,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:54,895 INFO L422 BasicCegarLoop]: trace histogram [23, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:54,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:07:54,895 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -172902395, now seen corresponding path program 26 times [2020-10-12 10:07:54,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:54,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103167586] [2020-10-12 10:07:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:59,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:07:59,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:59,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:07:59,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:07:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:07:59,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:07:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:00,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:00,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:00,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 10:08:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:00,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:08:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:00,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 4 proven. 276 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:08:00,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103167586] [2020-10-12 10:08:00,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:00,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:08:00,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207951881] [2020-10-12 10:08:00,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:08:00,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:08:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:08:00,315 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 27 states. [2020-10-12 10:08:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:00,568 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-12 10:08:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:08:00,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-12 10:08:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:00,569 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:08:00,569 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 10:08:00,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:08:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 10:08:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-12 10:08:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:08:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 10:08:00,579 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-12 10:08:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:00,579 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 10:08:00,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:08:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 10:08:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:08:00,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:00,580 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:00,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:08:00,581 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1747466281, now seen corresponding path program 27 times [2020-10-12 10:08:00,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:00,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519492803] [2020-10-12 10:08:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:08:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:08:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 10:08:06,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:06,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:06,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:08:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:06,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:06,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:06,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:06,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:06,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:06,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:08:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:06,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:06,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:06,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:08:06,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519492803] [2020-10-12 10:08:06,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:06,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:08:06,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086293531] [2020-10-12 10:08:06,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:08:06,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:08:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:08:06,040 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 28 states. [2020-10-12 10:08:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:06,278 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-10-12 10:08:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:08:06,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-12 10:08:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:06,279 INFO L225 Difference]: With dead ends: 92 [2020-10-12 10:08:06,279 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 10:08:06,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:08:06,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 10:08:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-12 10:08:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:08:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 10:08:06,292 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-12 10:08:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:06,292 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 10:08:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:08:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 10:08:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:08:06,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:06,293 INFO L422 BasicCegarLoop]: trace histogram [25, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:06,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:08:06,294 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1149353093, now seen corresponding path program 28 times [2020-10-12 10:08:06,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:06,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958437356] [2020-10-12 10:08:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:06,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:08,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:08:11,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:11,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:08:11,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:11,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:11,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:08:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:11,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:08:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:11,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:11,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 325 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:08:11,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958437356] [2020-10-12 10:08:11,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:11,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:08:11,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94842340] [2020-10-12 10:08:11,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:08:11,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:08:11,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:08:11,755 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 29 states. [2020-10-12 10:08:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:11,954 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-12 10:08:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:08:11,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-12 10:08:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:11,956 INFO L225 Difference]: With dead ends: 97 [2020-10-12 10:08:11,956 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 10:08:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:08:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 10:08:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-12 10:08:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:08:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 10:08:11,968 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-10-12 10:08:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:11,968 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 10:08:11,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:08:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 10:08:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 10:08:11,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:11,969 INFO L422 BasicCegarLoop]: trace histogram [26, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:11,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:08:11,970 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:11,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1569400646, now seen corresponding path program 29 times [2020-10-12 10:08:11,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:11,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284452564] [2020-10-12 10:08:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:08:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:17,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 10:08:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:17,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:08:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:17,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284452564] [2020-10-12 10:08:17,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:17,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:08:17,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357134845] [2020-10-12 10:08:17,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:08:17,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:08:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:08:17,464 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 30 states. [2020-10-12 10:08:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:17,759 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-12 10:08:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:08:17,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-10-12 10:08:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:17,761 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:08:17,761 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:08:17,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:08:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:08:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-12 10:08:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:08:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 10:08:17,771 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-12 10:08:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:17,772 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 10:08:17,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:08:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 10:08:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:08:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:17,773 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:17,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:08:17,773 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1296239254, now seen corresponding path program 30 times [2020-10-12 10:08:17,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:17,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622272920] [2020-10-12 10:08:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:08:22,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:08:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:23,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:23,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:08:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:23,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:23,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 10:08:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:23,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:23,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:23,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:23,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622272920] [2020-10-12 10:08:23,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:23,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:08:23,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620549174] [2020-10-12 10:08:23,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:08:23,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:08:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:08:23,284 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 31 states. [2020-10-12 10:08:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:23,577 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-12 10:08:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:08:23,578 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-10-12 10:08:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:23,579 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:08:23,579 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 10:08:23,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:08:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 10:08:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-12 10:08:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 10:08:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-12 10:08:23,587 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-12 10:08:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:23,588 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-12 10:08:23,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:08:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-12 10:08:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 10:08:23,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:23,589 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:23,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:08:23,589 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash 63237062, now seen corresponding path program 31 times [2020-10-12 10:08:23,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:23,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240561032] [2020-10-12 10:08:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:23,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:28,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:28,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 10:08:28,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:08:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:29,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:29,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:29,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:29,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:29,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:29,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:29,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 10:08:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:29,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:29,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:29,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:08:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:29,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:29,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:08:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 4 proven. 406 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:29,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240561032] [2020-10-12 10:08:29,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:29,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:08:29,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906842276] [2020-10-12 10:08:29,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:08:29,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:08:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:08:29,133 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-10-12 10:08:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:29,420 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-12 10:08:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:08:29,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2020-10-12 10:08:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:29,422 INFO L225 Difference]: With dead ends: 101 [2020-10-12 10:08:29,422 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:08:29,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:08:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:08:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-10-12 10:08:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:08:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 10:08:29,435 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-12 10:08:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:29,435 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 10:08:29,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:08:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 10:08:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:08:29,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:29,438 INFO L422 BasicCegarLoop]: trace histogram [29, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:29,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:08:29,438 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -742670102, now seen corresponding path program 32 times [2020-10-12 10:08:29,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:29,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053534458] [2020-10-12 10:08:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:08:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:35,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:35,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:35,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:35,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:35,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:08:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:35,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:35,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:35,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:35,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:35,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:35,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:08:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:35,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:35,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:35,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:35,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053534458] [2020-10-12 10:08:35,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:35,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:08:35,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291017619] [2020-10-12 10:08:35,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:08:35,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:35,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:08:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:08:35,056 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 33 states. [2020-10-12 10:08:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:35,347 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-12 10:08:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:08:35,348 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2020-10-12 10:08:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:35,349 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:08:35,349 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 10:08:35,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:08:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 10:08:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-12 10:08:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:08:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 10:08:35,357 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-10-12 10:08:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:35,358 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 10:08:35,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:08:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 10:08:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 10:08:35,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:35,359 INFO L422 BasicCegarLoop]: trace histogram [30, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:35,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:08:35,359 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash 44011590, now seen corresponding path program 33 times [2020-10-12 10:08:35,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:35,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957450613] [2020-10-12 10:08:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:08:40,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:40,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:40,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:40,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:40,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:40,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:40,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:08:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:40,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:40,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:40,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:40,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:40,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:08:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:40,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:40,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:40,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:40,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:40,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 4 proven. 465 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:40,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957450613] [2020-10-12 10:08:40,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:40,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:08:40,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384949872] [2020-10-12 10:08:40,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:08:40,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:08:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:08:40,915 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 34 states. [2020-10-12 10:08:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:41,226 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-12 10:08:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:08:41,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-10-12 10:08:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:41,228 INFO L225 Difference]: With dead ends: 103 [2020-10-12 10:08:41,228 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:08:41,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:08:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:08:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-12 10:08:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:08:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 10:08:41,236 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-12 10:08:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:41,236 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 10:08:41,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:08:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 10:08:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:08:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:41,238 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:41,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:08:41,238 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1338659734, now seen corresponding path program 34 times [2020-10-12 10:08:41,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:41,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139712332] [2020-10-12 10:08:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:41,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:08:46,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:46,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:46,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:08:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:46,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 10:08:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:46,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:46,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:46,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139712332] [2020-10-12 10:08:46,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:46,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:08:46,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559513274] [2020-10-12 10:08:46,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:08:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:08:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:08:46,881 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 35 states. [2020-10-12 10:08:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:47,094 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-12 10:08:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:08:47,095 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2020-10-12 10:08:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:47,096 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:08:47,096 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 10:08:47,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:08:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 10:08:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-10-12 10:08:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:08:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 10:08:47,107 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-12 10:08:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:47,107 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 10:08:47,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:08:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 10:08:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 10:08:47,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:47,108 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:47,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:08:47,109 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:47,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:47,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1251797818, now seen corresponding path program 35 times [2020-10-12 10:08:47,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:47,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317376891] [2020-10-12 10:08:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:47,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:47,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:52,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 10:08:52,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:08:52,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:52,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:52,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:52,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:52,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:52,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 10:08:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:52,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:52,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:52,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:52,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:52,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:08:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:52,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:52,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 4 proven. 528 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:52,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317376891] [2020-10-12 10:08:52,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:52,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:08:52,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713149330] [2020-10-12 10:08:52,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:08:52,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:08:52,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:08:52,807 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 36 states. [2020-10-12 10:08:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:53,136 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-10-12 10:08:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:08:53,137 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2020-10-12 10:08:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:53,137 INFO L225 Difference]: With dead ends: 105 [2020-10-12 10:08:53,138 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 10:08:53,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:08:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 10:08:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-10-12 10:08:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:08:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 10:08:53,153 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-12 10:08:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:53,153 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 10:08:53,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:08:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 10:08:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:08:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:53,154 INFO L422 BasicCegarLoop]: trace histogram [33, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:53,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:08:53,155 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1440921578, now seen corresponding path program 36 times [2020-10-12 10:08:53,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:53,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034387368] [2020-10-12 10:08:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:53,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:08:58,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:08:58,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:58,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:08:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:58,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 10:08:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:58,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 4 proven. 561 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:08:58,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034387368] [2020-10-12 10:08:58,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:58,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:08:58,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055152317] [2020-10-12 10:08:58,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:08:58,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:08:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:08:58,886 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-10-12 10:08:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:59,257 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-12 10:08:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:08:59,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 66 [2020-10-12 10:08:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:59,264 INFO L225 Difference]: With dead ends: 110 [2020-10-12 10:08:59,264 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 10:08:59,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:08:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 10:08:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-12 10:08:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 10:08:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-12 10:08:59,273 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-12 10:08:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:59,273 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-12 10:08:59,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:08:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-12 10:08:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 10:08:59,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:59,274 INFO L422 BasicCegarLoop]: trace histogram [34, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:59,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:08:59,275 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash -882694839, now seen corresponding path program 37 times [2020-10-12 10:08:59,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:59,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758116704] [2020-10-12 10:08:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:04,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:09:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:05,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:05,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:05,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:09:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:09:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:05,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 4 proven. 595 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:05,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758116704] [2020-10-12 10:09:05,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:05,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:09:05,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457321846] [2020-10-12 10:09:05,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:09:05,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:09:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:09:05,038 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 38 states. [2020-10-12 10:09:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:05,368 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-12 10:09:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:09:05,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2020-10-12 10:09:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:05,370 INFO L225 Difference]: With dead ends: 112 [2020-10-12 10:09:05,370 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 10:09:05,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:09:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 10:09:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-12 10:09:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:09:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 10:09:05,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-12 10:09:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:05,389 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 10:09:05,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:09:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 10:09:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:09:05,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:05,392 INFO L422 BasicCegarLoop]: trace histogram [35, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:05,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 10:09:05,393 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 816644005, now seen corresponding path program 38 times [2020-10-12 10:09:05,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:05,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955075898] [2020-10-12 10:09:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:05,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:10,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:10,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:09:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:11,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:11,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:11,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:11,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:11,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:11,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:11,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:11,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:11,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:11,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:09:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:11,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:11,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:11,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:11,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:11,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:09:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:11,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 630 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955075898] [2020-10-12 10:09:11,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:11,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:09:11,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904987704] [2020-10-12 10:09:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:09:11,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:09:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:09:11,193 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 39 states. [2020-10-12 10:09:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:11,462 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-12 10:09:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:09:11,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 69 [2020-10-12 10:09:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:11,463 INFO L225 Difference]: With dead ends: 113 [2020-10-12 10:09:11,464 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 10:09:11,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:09:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 10:09:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-12 10:09:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:09:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 10:09:11,474 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-12 10:09:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:11,475 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 10:09:11,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:09:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 10:09:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:09:11,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:11,476 INFO L422 BasicCegarLoop]: trace histogram [36, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:11,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 10:09:11,476 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1956540617, now seen corresponding path program 39 times [2020-10-12 10:09:11,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:11,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268961065] [2020-10-12 10:09:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:09:16,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:16,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:09:16,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:17,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:17,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:17,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:17,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:17,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:17,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:09:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:17,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:17,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:17,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:17,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:17,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 10:09:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:17,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 4 proven. 666 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:17,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268961065] [2020-10-12 10:09:17,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:17,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:09:17,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699143331] [2020-10-12 10:09:17,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:09:17,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:09:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:09:17,307 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 40 states. [2020-10-12 10:09:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:17,683 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-12 10:09:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:09:17,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 70 [2020-10-12 10:09:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:17,691 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:09:17,691 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 10:09:17,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:09:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 10:09:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-12 10:09:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 10:09:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-12 10:09:17,701 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-12 10:09:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:17,701 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-12 10:09:17,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:09:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-12 10:09:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 10:09:17,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:17,702 INFO L422 BasicCegarLoop]: trace histogram [37, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 10:09:17,703 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1361370075, now seen corresponding path program 40 times [2020-10-12 10:09:17,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:17,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683139073] [2020-10-12 10:09:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:17,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:09:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:09:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:23,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:23,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:23,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:23,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:23,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 10:09:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:23,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:23,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:23,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:09:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:23,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:23,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 4 proven. 703 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:23,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683139073] [2020-10-12 10:09:23,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:23,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:09:23,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334062360] [2020-10-12 10:09:23,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:09:23,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:09:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:09:23,713 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 41 states. [2020-10-12 10:09:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:24,103 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2020-10-12 10:09:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:09:24,104 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 71 [2020-10-12 10:09:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:24,104 INFO L225 Difference]: With dead ends: 115 [2020-10-12 10:09:24,105 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 10:09:24,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:09:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 10:09:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-12 10:09:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 10:09:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-12 10:09:24,117 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-12 10:09:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:24,117 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-12 10:09:24,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:09:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-12 10:09:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:09:24,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:24,118 INFO L422 BasicCegarLoop]: trace histogram [38, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:24,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 10:09:24,118 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1137386423, now seen corresponding path program 41 times [2020-10-12 10:09:24,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:24,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452306389] [2020-10-12 10:09:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:09:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:09:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:30,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:30,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:09:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:30,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:30,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:30,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:30,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:30,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 10:09:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:30,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 4 proven. 741 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:30,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452306389] [2020-10-12 10:09:30,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:30,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:09:30,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891164516] [2020-10-12 10:09:30,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:09:30,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:09:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:09:30,105 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 42 states. [2020-10-12 10:09:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:30,495 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-12 10:09:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:09:30,496 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-10-12 10:09:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:30,497 INFO L225 Difference]: With dead ends: 116 [2020-10-12 10:09:30,497 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 10:09:30,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:09:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 10:09:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-12 10:09:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:09:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 10:09:30,508 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-12 10:09:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:30,508 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 10:09:30,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:09:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 10:09:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 10:09:30,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:30,509 INFO L422 BasicCegarLoop]: trace histogram [39, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:30,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 10:09:30,509 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1511139493, now seen corresponding path program 42 times [2020-10-12 10:09:30,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:30,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523543076] [2020-10-12 10:09:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:35,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:35,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 10:09:35,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:09:35,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:09:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:09:35,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:36,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 10:09:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:36,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:09:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:36,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:36,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:36,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:36,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 4 proven. 780 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:36,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523543076] [2020-10-12 10:09:36,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:36,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:09:36,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905197036] [2020-10-12 10:09:36,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:09:36,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:09:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:09:36,485 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 43 states. [2020-10-12 10:09:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:36,887 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-10-12 10:09:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:09:36,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 73 [2020-10-12 10:09:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:36,889 INFO L225 Difference]: With dead ends: 117 [2020-10-12 10:09:36,889 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:09:36,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:09:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:09:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-12 10:09:36,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:09:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-12 10:09:36,899 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-12 10:09:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:36,899 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-12 10:09:36,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:09:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-12 10:09:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 10:09:36,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:36,901 INFO L422 BasicCegarLoop]: trace histogram [40, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:36,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 10:09:36,901 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2011064265, now seen corresponding path program 43 times [2020-10-12 10:09:36,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:36,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999194830] [2020-10-12 10:09:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:36,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:36,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:41,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:09:41,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:43,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:43,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 10:09:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:43,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:43,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:43,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:43,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:09:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:43,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:43,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 4 proven. 820 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:43,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999194830] [2020-10-12 10:09:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:09:43,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70351052] [2020-10-12 10:09:43,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:09:43,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:09:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:09:43,012 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 44 states. [2020-10-12 10:09:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:43,416 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2020-10-12 10:09:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:09:43,417 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 74 [2020-10-12 10:09:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:43,418 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:09:43,418 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:09:43,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:09:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:09:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-10-12 10:09:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:09:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-12 10:09:43,429 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-12 10:09:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:43,429 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-12 10:09:43,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 10:09:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-12 10:09:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 10:09:43,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:43,430 INFO L422 BasicCegarLoop]: trace histogram [41, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:43,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 10:09:43,430 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 328863013, now seen corresponding path program 44 times [2020-10-12 10:09:43,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:43,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170689446] [2020-10-12 10:09:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:48,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:09:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:49,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:49,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:49,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:49,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:09:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:49,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:49,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:49,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:49,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:49,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:49,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 10:09:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:49,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:49,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 4 proven. 861 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 10:09:49,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170689446] [2020-10-12 10:09:49,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:49,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 10:09:49,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400476284] [2020-10-12 10:09:49,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 10:09:49,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:49,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 10:09:49,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:09:49,495 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 45 states. [2020-10-12 10:09:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:49,796 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2020-10-12 10:09:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:09:49,797 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 75 [2020-10-12 10:09:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:49,798 INFO L225 Difference]: With dead ends: 123 [2020-10-12 10:09:49,798 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 10:09:49,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:09:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 10:09:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-12 10:09:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:09:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 10:09:49,810 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2020-10-12 10:09:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:49,810 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 10:09:49,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 10:09:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 10:09:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 10:09:49,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:49,811 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:49,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 10:09:49,812 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash -522531930, now seen corresponding path program 45 times [2020-10-12 10:09:49,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:49,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768318597] [2020-10-12 10:09:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:54,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:09:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:09:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 10:09:54,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:55,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:55,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:55,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:55,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 10:09:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:55,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:55,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:55,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:55,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:55,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:55,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:55,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:09:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:09:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 4 proven. 903 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:09:55,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768318597] [2020-10-12 10:09:55,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:55,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:09:55,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811051293] [2020-10-12 10:09:55,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:09:55,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:09:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:09:55,915 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 46 states. [2020-10-12 10:09:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:56,274 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-12 10:09:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:09:56,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 77 [2020-10-12 10:09:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:56,276 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:09:56,276 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:09:56,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:09:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:09:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-10-12 10:09:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 10:09:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-12 10:09:56,285 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-12 10:09:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:56,286 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-12 10:09:56,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:09:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-12 10:09:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 10:09:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:56,287 INFO L422 BasicCegarLoop]: trace histogram [43, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:56,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 10:09:56,287 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1301620534, now seen corresponding path program 46 times [2020-10-12 10:09:56,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:56,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438248065] [2020-10-12 10:09:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:56,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:01,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:01,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 10:10:01,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:01,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:10:01,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:10:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:10:01,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:02,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:02,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:02,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:02,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:10:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:02,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:02,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:02,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-12 10:10:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:02,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:02,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:02,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:02,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438248065] [2020-10-12 10:10:02,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:02,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:10:02,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878085190] [2020-10-12 10:10:02,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:10:02,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:10:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:10:02,473 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 47 states. [2020-10-12 10:10:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:02,964 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-12 10:10:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:10:02,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 78 [2020-10-12 10:10:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:02,965 INFO L225 Difference]: With dead ends: 126 [2020-10-12 10:10:02,965 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 10:10:02,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:10:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 10:10:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-12 10:10:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 10:10:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-12 10:10:02,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-12 10:10:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:02,976 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-12 10:10:02,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:10:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-12 10:10:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:10:02,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:02,977 INFO L422 BasicCegarLoop]: trace histogram [44, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:02,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 10:10:02,978 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 316436518, now seen corresponding path program 47 times [2020-10-12 10:10:02,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:02,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236881330] [2020-10-12 10:10:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:08,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:08,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 10:10:08,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 10:10:08,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 10:10:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:10:08,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:09,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:09,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:09,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 10:10:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:09,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:09,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:09,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:09,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-12 10:10:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 4 proven. 990 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:09,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236881330] [2020-10-12 10:10:09,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:09,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 10:10:09,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325842089] [2020-10-12 10:10:09,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 10:10:09,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 10:10:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:10:09,215 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 48 states. [2020-10-12 10:10:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:09,584 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2020-10-12 10:10:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:10:09,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 79 [2020-10-12 10:10:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:09,586 INFO L225 Difference]: With dead ends: 127 [2020-10-12 10:10:09,586 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:10:09,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:10:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:10:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-10-12 10:10:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:10:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 10:10:09,597 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-12 10:10:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:09,597 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 10:10:09,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 10:10:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 10:10:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 10:10:09,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:09,598 INFO L422 BasicCegarLoop]: trace histogram [45, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:09,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 10:10:09,598 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:09,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1063402422, now seen corresponding path program 48 times [2020-10-12 10:10:09,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:09,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684263684] [2020-10-12 10:10:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:14,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:10:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:15,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:10:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:15,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:10:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:15,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:15,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:15,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 4 proven. 1035 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:15,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684263684] [2020-10-12 10:10:15,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:15,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 10:10:15,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427962114] [2020-10-12 10:10:15,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 10:10:15,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 10:10:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:10:15,870 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 49 states. [2020-10-12 10:10:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:16,161 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-12 10:10:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:10:16,162 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2020-10-12 10:10:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:16,163 INFO L225 Difference]: With dead ends: 128 [2020-10-12 10:10:16,163 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:10:16,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:10:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:10:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2020-10-12 10:10:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 10:10:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-12 10:10:16,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-12 10:10:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:16,176 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-12 10:10:16,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 10:10:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-12 10:10:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 10:10:16,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:16,177 INFO L422 BasicCegarLoop]: trace histogram [46, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:16,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 10:10:16,178 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash -888736602, now seen corresponding path program 49 times [2020-10-12 10:10:16,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:16,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688276823] [2020-10-12 10:10:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:21,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 10:10:21,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:21,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:10:21,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:22,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:22,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:22,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:22,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:10:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:22,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:22,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:22,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:22,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-12 10:10:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:22,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:22,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:22,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:22,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 4 proven. 1081 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:22,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688276823] [2020-10-12 10:10:22,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:22,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 10:10:22,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722529643] [2020-10-12 10:10:22,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 10:10:22,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 10:10:22,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:10:22,509 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 50 states. [2020-10-12 10:10:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:23,005 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-12 10:10:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:10:23,006 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2020-10-12 10:10:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:23,007 INFO L225 Difference]: With dead ends: 129 [2020-10-12 10:10:23,007 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 10:10:23,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:10:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 10:10:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2020-10-12 10:10:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 10:10:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-12 10:10:23,018 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-12 10:10:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:23,019 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-12 10:10:23,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 10:10:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-12 10:10:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:10:23,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:23,019 INFO L422 BasicCegarLoop]: trace histogram [47, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:23,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 10:10:23,020 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash 230936522, now seen corresponding path program 50 times [2020-10-12 10:10:23,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:23,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659349936] [2020-10-12 10:10:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:23,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:28,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:10:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:29,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:29,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:29,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:29,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 10:10:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:29,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-12 10:10:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:29,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 4 proven. 1128 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:29,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659349936] [2020-10-12 10:10:29,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:29,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 10:10:29,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575143477] [2020-10-12 10:10:29,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 10:10:29,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 10:10:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:10:29,431 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 51 states. [2020-10-12 10:10:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:29,897 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-12 10:10:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 10:10:29,897 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 82 [2020-10-12 10:10:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:29,899 INFO L225 Difference]: With dead ends: 130 [2020-10-12 10:10:29,899 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 10:10:29,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:10:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 10:10:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-12 10:10:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 10:10:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-12 10:10:29,909 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-12 10:10:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:29,909 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-12 10:10:29,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 10:10:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-12 10:10:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 10:10:29,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:29,910 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:29,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 10:10:29,910 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 581064998, now seen corresponding path program 51 times [2020-10-12 10:10:29,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:29,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356193771] [2020-10-12 10:10:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:29,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:30,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:34,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:34,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:10:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:36,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:36,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:36,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:36,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-12 10:10:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:36,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:36,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:36,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-12 10:10:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:36,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:36,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 4 proven. 1176 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:36,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356193771] [2020-10-12 10:10:36,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:36,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 10:10:36,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054970217] [2020-10-12 10:10:36,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 10:10:36,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 10:10:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:10:36,340 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 52 states. [2020-10-12 10:10:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:36,849 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2020-10-12 10:10:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:10:36,849 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 83 [2020-10-12 10:10:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:36,850 INFO L225 Difference]: With dead ends: 131 [2020-10-12 10:10:36,850 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 10:10:36,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:10:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 10:10:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2020-10-12 10:10:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 10:10:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-12 10:10:36,862 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-12 10:10:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:36,862 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-12 10:10:36,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 10:10:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-12 10:10:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 10:10:36,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:36,863 INFO L422 BasicCegarLoop]: trace histogram [49, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:36,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 10:10:36,863 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1449854134, now seen corresponding path program 52 times [2020-10-12 10:10:36,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:36,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023819307] [2020-10-12 10:10:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 10:10:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 10:10:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:43,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:43,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:43,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:10:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:43,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:43,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:43,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:43,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:43,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:43,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:43,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:43,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:43,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-12 10:10:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:43,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:43,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:43,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:43,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 4 proven. 1225 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 10:10:43,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023819307] [2020-10-12 10:10:43,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:43,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 10:10:43,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293223842] [2020-10-12 10:10:43,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 10:10:43,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 10:10:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:10:43,366 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 53 states. [2020-10-12 10:10:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:43,786 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-12 10:10:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:10:43,786 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 84 [2020-10-12 10:10:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:43,787 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:10:43,787 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 10:10:43,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:10:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 10:10:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-10-12 10:10:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:10:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-12 10:10:43,799 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 84 [2020-10-12 10:10:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:43,800 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-12 10:10:43,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 10:10:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-12 10:10:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 10:10:43,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:43,801 INFO L422 BasicCegarLoop]: trace histogram [50, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:43,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 10:10:43,801 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash 61377769, now seen corresponding path program 53 times [2020-10-12 10:10:43,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:43,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807764398] [2020-10-12 10:10:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:45,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:48,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:48,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 10:10:48,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-12 10:10:48,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 10:10:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:10:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:50,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:50,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:50,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:50,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-12 10:10:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:50,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:50,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-12 10:10:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:50,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:50,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:50,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:50,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:50,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:50,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:50,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:50,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:10:50,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:50,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 4 proven. 1275 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 10:10:50,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807764398] [2020-10-12 10:10:50,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:50,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 10:10:50,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186972665] [2020-10-12 10:10:50,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 10:10:50,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 10:10:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:10:50,379 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 54 states. [2020-10-12 10:10:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:50,953 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-12 10:10:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 10:10:50,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 86 [2020-10-12 10:10:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:50,955 INFO L225 Difference]: With dead ends: 138 [2020-10-12 10:10:50,955 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 10:10:50,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:10:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 10:10:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2020-10-12 10:10:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 10:10:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-12 10:10:50,967 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-10-12 10:10:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:50,967 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-12 10:10:50,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 10:10:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-12 10:10:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 10:10:50,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:50,968 INFO L422 BasicCegarLoop]: trace histogram [51, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:50,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 10:10:50,969 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:50,969 INFO L82 PathProgramCache]: Analyzing trace with hash 153815109, now seen corresponding path program 54 times [2020-10-12 10:10:50,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:50,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092759157] [2020-10-12 10:10:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:56,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 10:10:56,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:10:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0