/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:30:18,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:30:18,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:30:18,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:30:18,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:30:18,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:30:18,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:30:18,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:30:18,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:30:18,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:30:18,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:30:18,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:30:18,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:30:18,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:30:18,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:30:18,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:30:18,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:30:18,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:30:18,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:30:18,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:30:18,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:30:18,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:30:18,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:30:18,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:30:18,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:30:18,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:30:18,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:30:18,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:30:18,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:30:18,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:30:18,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:30:18,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:30:18,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:30:18,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:30:18,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:30:18,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:30:18,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:30:18,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:30:18,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:30:18,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:30:18,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:30:18,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:30:18,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:30:18,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:30:18,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:30:18,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:30:18,231 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:30:18,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:30:18,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:30:18,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:30:18,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:30:18,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:30:18,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:30:18,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:30:18,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:30:18,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:30:18,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:30:18,235 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:30:18,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:30:18,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:30:18,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:30:18,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:30:18,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:30:18,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:18,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:30:18,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:30:18,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:30:18,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:30:18,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:30:18,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:30:18,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:30:18,776 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:30:18,777 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-21 11:30:18,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aad35e399/cecc6944c725495aa51e924ae20aed76/FLAG60f489ed2 [2020-09-21 11:30:19,439 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:30:19,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-21 11:30:19,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aad35e399/cecc6944c725495aa51e924ae20aed76/FLAG60f489ed2 [2020-09-21 11:30:19,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aad35e399/cecc6944c725495aa51e924ae20aed76 [2020-09-21 11:30:19,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:30:19,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:30:19,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:19,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:30:19,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:30:19,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:19" (1/1) ... [2020-09-21 11:30:19,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68901205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:19, skipping insertion in model container [2020-09-21 11:30:19,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:19" (1/1) ... [2020-09-21 11:30:19,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:30:19,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:30:20,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,088 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:30:20,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,127 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:30:20,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20 WrapperNode [2020-09-21 11:30:20,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:20,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:30:20,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:30:20,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:30:20,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:30:20,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:30:20,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:20,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:30:20,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:30:20,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:30:20,343 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-21 11:30:20,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:30:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:30:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:30:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:30:20,344 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:30:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:30:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:30:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:30:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:30:20,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:30:20,696 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:30:20,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:20 BoogieIcfgContainer [2020-09-21 11:30:20,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:30:20,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:30:20,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:30:20,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:30:20,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:30:19" (1/3) ... [2020-09-21 11:30:20,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535263f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:20, skipping insertion in model container [2020-09-21 11:30:20,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (2/3) ... [2020-09-21 11:30:20,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535263f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:20, skipping insertion in model container [2020-09-21 11:30:20,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:20" (3/3) ... [2020-09-21 11:30:20,722 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-21 11:30:20,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:30:20,744 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:30:20,764 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:30:20,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:30:20,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:30:20,791 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:30:20,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:30:20,791 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:30:20,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:30:20,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:30:20,791 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:30:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 11:30:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:30:20,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:20,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:20,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-09-21 11:30:20,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:20,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251859418] [2020-09-21 11:30:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,987 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,987 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:30:20,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:20,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,066 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,099 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,100 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,100 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,100 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:21,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251859418] [2020-09-21 11:30:21,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:21,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:30:21,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323324599] [2020-09-21 11:30:21,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:30:21,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:30:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:30:21,144 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-09-21 11:30:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,312 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-09-21 11:30:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:30:21,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-21 11:30:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,328 INFO L225 Difference]: With dead ends: 59 [2020-09-21 11:30:21,328 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:30:21,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:30:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-21 11:30:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:30:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 11:30:21,382 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-09-21 11:30:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,383 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 11:30:21,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:30:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 11:30:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:30:21,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:30:21,385 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,386 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-09-21 11:30:21,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216795595] [2020-09-21 11:30:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,441 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,441 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,441 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,442 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:30:21,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:30:21,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:21,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:21,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:30:21,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,497 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,497 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:30:21,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,584 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,584 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,584 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,586 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:21,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:30:21,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216795595] [2020-09-21 11:30:21,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:21,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:30:21,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354200355] [2020-09-21 11:30:21,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:30:21,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:30:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:21,655 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-21 11:30:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,853 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-21 11:30:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:30:21,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 11:30:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,855 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:30:21,856 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:30:21,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:30:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:30:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 11:30:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:30:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 11:30:21,866 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-09-21 11:30:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,866 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 11:30:21,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:30:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 11:30:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:30:21,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:30:21,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-09-21 11:30:21,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499904516] [2020-09-21 11:30:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,925 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,925 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,925 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:30:21,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:30:21,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:30:21,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:21,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:21,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,004 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,005 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,005 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:30:22,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,070 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,070 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,071 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,071 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:30:22,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:30:22,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:30:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:22,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:30:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499904516] [2020-09-21 11:30:22,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:30:22,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870024087] [2020-09-21 11:30:22,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:30:22,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:30:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:30:22,116 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-09-21 11:30:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,274 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-21 11:30:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:30:22,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-21 11:30:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,276 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:30:22,276 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:30:22,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:30:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:30:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-21 11:30:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:30:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-21 11:30:22,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-09-21 11:30:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,285 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-21 11:30:22,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:30:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-21 11:30:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:30:22,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:30:22,287 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-09-21 11:30:22,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830221442] [2020-09-21 11:30:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,321 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:30:22,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:30:22,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:30:22,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:22,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:30:22,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,356 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,356 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,356 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,357 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,394 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,395 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,395 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,395 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 11:30:22,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:30:22,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:30:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:22,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830221442] [2020-09-21 11:30:22,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:30:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239028577] [2020-09-21 11:30:22,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:30:22,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:30:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:30:22,537 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-09-21 11:30:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,721 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-09-21 11:30:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:30:22,721 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-21 11:30:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,723 INFO L225 Difference]: With dead ends: 52 [2020-09-21 11:30:22,723 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:30:22,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:30:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 11:30:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:30:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-21 11:30:22,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-09-21 11:30:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,733 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-21 11:30:22,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:30:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-21 11:30:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:30:22,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:30:22,735 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-09-21 11:30:22,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938304032] [2020-09-21 11:30:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,777 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,778 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,778 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,778 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:30:22,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:30:22,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:22,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:22,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:22,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,815 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,815 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,815 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:22,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,858 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,858 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 11:30:22,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:30:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:30:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938304032] [2020-09-21 11:30:22,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:30:22,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688506243] [2020-09-21 11:30:22,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:30:22,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:30:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:30:22,962 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-09-21 11:30:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,127 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-09-21 11:30:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:30:23,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-21 11:30:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,129 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:30:23,129 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:30:23,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:30:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-21 11:30:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:30:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-21 11:30:23,137 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-09-21 11:30:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,138 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-21 11:30:23,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:30:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-21 11:30:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:30:23,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:30:23,139 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-09-21 11:30:23,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862046848] [2020-09-21 11:30:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,177 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,177 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,178 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,178 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:30:23,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:30:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,214 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,215 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,215 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,215 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,256 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,256 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,257 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,257 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:30:23,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:30:23,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:30:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:30:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:23,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862046848] [2020-09-21 11:30:23,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:23,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:30:23,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922152618] [2020-09-21 11:30:23,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:30:23,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:23,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:30:23,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:30:23,468 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-09-21 11:30:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,697 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-09-21 11:30:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:30:23,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 11:30:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,699 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:30:23,699 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:30:23,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:30:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:30:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-21 11:30:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:30:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-21 11:30:23,716 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-09-21 11:30:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-21 11:30:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:30:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-21 11:30:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:30:23,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,721 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:30:23,722 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-09-21 11:30:23,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420453147] [2020-09-21 11:30:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,776 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,776 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,776 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,777 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:30:23,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:30:23,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:30:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:30:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,822 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,822 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,822 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,822 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,873 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,873 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:30:23,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:30:23,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:30:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:23,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:30:23,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:24,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420453147] [2020-09-21 11:30:24,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:24,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:30:24,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638788292] [2020-09-21 11:30:24,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:30:24,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:30:24,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:24,231 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-09-21 11:30:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:24,490 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-09-21 11:30:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:30:24,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 11:30:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:24,491 INFO L225 Difference]: With dead ends: 58 [2020-09-21 11:30:24,491 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:30:24,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:30:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:30:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 11:30:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:30:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-21 11:30:24,499 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-09-21 11:30:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:24,499 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-21 11:30:24,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:30:24,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-21 11:30:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:30:24,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:24,500 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:24,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:30:24,501 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-09-21 11:30:24,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:24,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108927631] [2020-09-21 11:30:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,538 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,538 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,539 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,539 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:30:24,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:30:24,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:30:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:30:24,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,573 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,573 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,618 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,618 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,618 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,619 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:30:24,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:30:24,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:30:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:30:24,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:24,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108927631] [2020-09-21 11:30:24,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:24,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:30:24,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651984543] [2020-09-21 11:30:24,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:30:24,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:30:24,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:24,909 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-09-21 11:30:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:25,114 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-09-21 11:30:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:30:25,115 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-09-21 11:30:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:25,116 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:30:25,116 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:30:25,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:30:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:30:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 11:30:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:30:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-21 11:30:25,123 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-09-21 11:30:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:25,124 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-21 11:30:25,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:30:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-21 11:30:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:30:25,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:25,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:25,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:30:25,126 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-09-21 11:30:25,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:25,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160507921] [2020-09-21 11:30:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,165 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,165 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,165 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:30:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:30:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,199 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,199 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,200 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,200 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:25,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:25,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:25,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,246 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,247 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,247 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,247 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:30:25,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:30:25,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:30:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:30:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:25,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160507921] [2020-09-21 11:30:25,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:25,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:30:25,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304938430] [2020-09-21 11:30:25,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:30:25,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:30:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:30:25,372 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-09-21 11:30:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:25,576 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-09-21 11:30:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:30:25,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-09-21 11:30:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:25,577 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:30:25,577 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:30:25,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:30:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:30:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-21 11:30:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:30:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-09-21 11:30:25,585 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-09-21 11:30:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:25,585 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-09-21 11:30:25,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:30:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-09-21 11:30:25,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:30:25,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:25,587 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:25,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:30:25,587 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:25,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-09-21 11:30:25,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:25,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492340307] [2020-09-21 11:30:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,629 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,630 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,630 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,630 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:30:25,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:30:25,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:30:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:30:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,663 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,664 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,664 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,664 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:25,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:25,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,718 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,719 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,719 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,719 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:30:25,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:30:25,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:30:25,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:30:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:26,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492340307] [2020-09-21 11:30:26,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:26,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:30:26,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408588847] [2020-09-21 11:30:26,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:30:26,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:30:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:30:26,120 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-09-21 11:30:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:26,376 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-09-21 11:30:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:30:26,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-21 11:30:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:26,377 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:30:26,377 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:30:26,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:30:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:30:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-21 11:30:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:30:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-21 11:30:26,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-09-21 11:30:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:26,386 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-21 11:30:26,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:30:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-21 11:30:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:30:26,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:26,387 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:26,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:30:26,388 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-09-21 11:30:26,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:26,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311220276] [2020-09-21 11:30:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,414 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,415 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,415 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,415 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:30:26,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:30:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,453 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,454 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,454 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,454 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:26,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,475 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,475 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,476 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,476 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:30:26,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 11:30:26,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311220276] [2020-09-21 11:30:26,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:26,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:30:26,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204558351] [2020-09-21 11:30:26,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:26,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:26,498 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-09-21 11:30:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:26,598 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-09-21 11:30:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:30:26,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-21 11:30:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:26,601 INFO L225 Difference]: With dead ends: 65 [2020-09-21 11:30:26,601 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 11:30:26,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 11:30:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-09-21 11:30:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:30:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-21 11:30:26,614 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-09-21 11:30:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:26,614 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-21 11:30:26,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-21 11:30:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:30:26,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:26,616 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:26,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:30:26,616 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-09-21 11:30:26,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:26,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332747710] [2020-09-21 11:30:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,644 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,644 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,644 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,644 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 11:30:26,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:26,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 11:30:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:30:26,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,690 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,690 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,711 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,711 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,712 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,712 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:30:26,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 11:30:26,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332747710] [2020-09-21 11:30:26,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:26,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:30:26,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556808383] [2020-09-21 11:30:26,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:30:26,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:30:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:26,732 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-09-21 11:30:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:26,840 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-09-21 11:30:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:30:26,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-21 11:30:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:26,842 INFO L225 Difference]: With dead ends: 73 [2020-09-21 11:30:26,842 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 11:30:26,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:30:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 11:30:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-21 11:30:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:30:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-09-21 11:30:26,850 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-09-21 11:30:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:26,850 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-09-21 11:30:26,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:30:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-09-21 11:30:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:30:26,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:26,851 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:26,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:30:26,852 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash -159448072, now seen corresponding path program 2 times [2020-09-21 11:30:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:26,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817077537] [2020-09-21 11:30:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,880 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,880 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:30:26,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-21 11:30:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,925 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,925 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,925 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:26,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,945 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,945 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,945 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,945 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:30:26,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-09-21 11:30:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-21 11:30:26,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817077537] [2020-09-21 11:30:26,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:26,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:30:26,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378831698] [2020-09-21 11:30:26,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:26,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:26,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:26,980 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-09-21 11:30:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:27,064 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-09-21 11:30:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:30:27,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-09-21 11:30:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:27,066 INFO L225 Difference]: With dead ends: 69 [2020-09-21 11:30:27,066 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:30:27,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:30:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 11:30:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:30:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-21 11:30:27,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-09-21 11:30:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:27,073 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-21 11:30:27,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-21 11:30:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:30:27,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:27,074 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:27,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:30:27,074 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 1 times [2020-09-21 11:30:27,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:27,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676130158] [2020-09-21 11:30:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,132 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,132 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,132 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:30:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:30:27,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:27,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,172 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,173 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,173 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,173 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:27,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:27,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,225 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,226 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,226 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:30:27,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:30:27,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:30:27,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:27,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:30:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:27,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676130158] [2020-09-21 11:30:27,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:27,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:30:27,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795116102] [2020-09-21 11:30:27,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:30:27,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:30:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:30:27,378 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-09-21 11:30:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:27,576 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-09-21 11:30:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:30:27,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-09-21 11:30:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:27,578 INFO L225 Difference]: With dead ends: 74 [2020-09-21 11:30:27,578 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:30:27,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:30:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:30:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 11:30:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 11:30:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-09-21 11:30:27,591 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-09-21 11:30:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:27,591 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-09-21 11:30:27,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:30:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-09-21 11:30:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:30:27,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:27,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:27,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:30:27,593 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-09-21 11:30:27,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:27,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902451243] [2020-09-21 11:30:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,671 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,671 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:30:27,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:30:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:30:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:27,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,732 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,732 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,732 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:27,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:27,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,811 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,811 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:28,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902451243] [2020-09-21 11:30:28,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:28,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:30:28,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457273184] [2020-09-21 11:30:28,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:30:28,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:30:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:30:28,006 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-09-21 11:30:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:28,295 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-09-21 11:30:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:30:28,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-21 11:30:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:28,296 INFO L225 Difference]: With dead ends: 76 [2020-09-21 11:30:28,296 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 11:30:28,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:30:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 11:30:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-21 11:30:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 11:30:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-09-21 11:30:28,306 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-09-21 11:30:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:28,306 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-09-21 11:30:28,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:30:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-09-21 11:30:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:30:28,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:28,309 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:28,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:30:28,309 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-09-21 11:30:28,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:28,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989870886] [2020-09-21 11:30:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,381 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:30:28,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:30:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:30:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,439 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,439 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,439 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,440 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:28,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:28,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:28,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,514 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,514 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:30:28,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:30:28,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:30:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:30:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:29,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989870886] [2020-09-21 11:30:29,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:29,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:30:29,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192605254] [2020-09-21 11:30:29,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:30:29,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:30:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:30:29,067 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-09-21 11:30:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:29,356 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-09-21 11:30:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:30:29,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-21 11:30:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:29,358 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:30:29,358 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 11:30:29,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:30:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 11:30:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-21 11:30:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 11:30:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-21 11:30:29,372 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-09-21 11:30:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:29,372 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-21 11:30:29,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:30:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-21 11:30:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 11:30:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:29,373 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:29,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:30:29,373 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-09-21 11:30:29,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:29,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281809001] [2020-09-21 11:30:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,451 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,451 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,451 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,451 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:30:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:30:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,495 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,495 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,495 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:29,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:29,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:29,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,565 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,566 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,566 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,566 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:30:29,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:30:29,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:30:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:29,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:30:29,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:30,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281809001] [2020-09-21 11:30:30,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:30,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:30:30,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190878992] [2020-09-21 11:30:30,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:30:30,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:30:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:30:30,281 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-09-21 11:30:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:30,628 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-09-21 11:30:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:30:30,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-09-21 11:30:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:30,630 INFO L225 Difference]: With dead ends: 80 [2020-09-21 11:30:30,630 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:30:30,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:30:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:30:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-21 11:30:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:30:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-21 11:30:30,638 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-09-21 11:30:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:30,639 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-21 11:30:30,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:30:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-21 11:30:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:30:30,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:30,640 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:30,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:30:30,641 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:30,641 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-09-21 11:30:30,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:30,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53823402] [2020-09-21 11:30:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,722 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,723 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,723 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,724 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:30:30,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 11:30:30,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:30:30,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:30,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:30:30,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:30,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,775 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,775 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,776 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,776 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:30,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:30,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,863 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,863 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,863 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:30:30,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:30:30,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:30:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:30,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:30:30,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:31,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53823402] [2020-09-21 11:30:31,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:31,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:30:31,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580484624] [2020-09-21 11:30:31,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:30:31,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:30:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:30:31,110 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-09-21 11:30:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:31,365 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-21 11:30:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:30:31,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-21 11:30:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:31,366 INFO L225 Difference]: With dead ends: 82 [2020-09-21 11:30:31,367 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 11:30:31,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:30:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 11:30:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-09-21 11:30:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 11:30:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-21 11:30:31,372 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-09-21 11:30:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:31,372 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-21 11:30:31,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:30:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-21 11:30:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 11:30:31,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:31,373 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:31,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:30:31,374 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-09-21 11:30:31,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:31,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48827683] [2020-09-21 11:30:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,460 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,460 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,460 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:30:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:30:31,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,506 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,506 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,506 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,506 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,582 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,582 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,582 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:30:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:30:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:31,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48827683] [2020-09-21 11:30:31,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:31,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:30:31,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109767351] [2020-09-21 11:30:31,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:30:31,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:30:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:30:31,880 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-09-21 11:30:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:32,184 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-09-21 11:30:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:30:32,184 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-09-21 11:30:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:32,185 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:30:32,186 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 11:30:32,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:30:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 11:30:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-09-21 11:30:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 11:30:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-21 11:30:32,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-09-21 11:30:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:32,193 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-21 11:30:32,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:30:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-21 11:30:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:30:32,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:32,195 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:32,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:30:32,195 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-09-21 11:30:32,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:32,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303291330] [2020-09-21 11:30:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:32,313 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:32,314 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:32,314 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:32,315 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:32,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:30:32,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:32,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-21 11:30:32,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:30:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:30:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:32,372 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:32,373 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:32,373 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:32,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:32,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:32,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:32,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:32,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:32,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:32,459 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:32,459 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:32,459 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:32,460 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:32,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:30:32,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:32,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:30:32,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:30:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:30:32,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:32,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303291330] [2020-09-21 11:30:32,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:32,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:30:32,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647790421] [2020-09-21 11:30:32,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:30:32,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:30:32,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:30:32,805 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-09-21 11:30:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:33,051 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-09-21 11:30:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:30:33,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-09-21 11:30:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:33,053 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:30:33,053 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 11:30:33,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:30:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 11:30:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-21 11:30:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 11:30:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-09-21 11:30:33,064 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-09-21 11:30:33,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:33,065 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-09-21 11:30:33,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:30:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-09-21 11:30:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 11:30:33,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:33,067 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:33,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:30:33,068 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-09-21 11:30:33,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:33,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259751593] [2020-09-21 11:30:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,164 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,164 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 11:30:33,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:30:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:33,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,219 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,220 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,220 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,220 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:33,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:33,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:33,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,352 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,352 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,353 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,353 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:30:33,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 11:30:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:30:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:30:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259751593] [2020-09-21 11:30:33,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:33,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:30:33,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462292483] [2020-09-21 11:30:33,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:30:33,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:33,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:30:33,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:30:33,730 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-09-21 11:30:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:33,996 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-09-21 11:30:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:30:33,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-21 11:30:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:33,998 INFO L225 Difference]: With dead ends: 88 [2020-09-21 11:30:33,998 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:30:33,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:30:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:30:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-21 11:30:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 11:30:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-09-21 11:30:34,004 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-09-21 11:30:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:34,004 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-09-21 11:30:34,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:30:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-09-21 11:30:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 11:30:34,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:34,005 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:34,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:30:34,006 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-09-21 11:30:34,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:34,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757389955] [2020-09-21 11:30:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:34,095 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:34,096 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:34,096 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:34,096 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:34,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-21 11:30:34,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:30:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:34,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:34,148 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:34,148 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:34,148 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:34,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:34,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:34,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:34,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:34,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:34,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:34,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:34,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:34,244 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:34,245 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:34,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:34,245 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:34,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:30:34,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:30:34,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:30:34,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:34,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:30:34,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:35,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757389955] [2020-09-21 11:30:35,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:35,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:30:35,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511339665] [2020-09-21 11:30:35,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:30:35,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:30:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:30:35,263 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-09-21 11:30:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:35,601 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-09-21 11:30:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:30:35,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-09-21 11:30:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:35,602 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:30:35,602 INFO L226 Difference]: Without dead ends: 68 [2020-09-21 11:30:35,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:30:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-21 11:30:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-21 11:30:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:30:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-09-21 11:30:35,609 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-09-21 11:30:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:35,609 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-09-21 11:30:35,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:30:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-09-21 11:30:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 11:30:35,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:35,610 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:35,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:30:35,610 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-09-21 11:30:35,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:35,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338706306] [2020-09-21 11:30:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,705 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,706 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,706 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-21 11:30:35,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:30:35,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:30:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:35,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:30:35,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,760 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,760 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,760 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,760 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,863 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,863 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,863 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:30:35,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:35,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:30:35,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:36,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338706306] [2020-09-21 11:30:36,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:36,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:30:36,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928533511] [2020-09-21 11:30:36,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:30:36,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:30:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:30:36,270 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-09-21 11:30:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:36,534 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-09-21 11:30:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:30:36,535 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-09-21 11:30:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:36,536 INFO L225 Difference]: With dead ends: 92 [2020-09-21 11:30:36,536 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:30:36,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:30:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:30:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-09-21 11:30:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 11:30:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-09-21 11:30:36,543 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-09-21 11:30:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:36,543 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-09-21 11:30:36,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:30:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-09-21 11:30:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 11:30:36,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:36,544 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:36,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:30:36,544 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-09-21 11:30:36,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:36,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156276236] [2020-09-21 11:30:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:36,642 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:36,642 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-21 11:30:36,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:30:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:30:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:36,698 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:36,698 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:36,698 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:36,698 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:36,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:36,802 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:36,802 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:36,803 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:36,803 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:30:36,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 11:30:36,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:30:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 11:30:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:37,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156276236] [2020-09-21 11:30:37,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:37,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:30:37,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486256354] [2020-09-21 11:30:37,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:30:37,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:30:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:30:37,843 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-09-21 11:30:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:38,254 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-09-21 11:30:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:30:38,255 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-09-21 11:30:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:38,256 INFO L225 Difference]: With dead ends: 94 [2020-09-21 11:30:38,256 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 11:30:38,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:30:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 11:30:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-09-21 11:30:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 11:30:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-09-21 11:30:38,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-09-21 11:30:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:38,264 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-09-21 11:30:38,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:30:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-09-21 11:30:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 11:30:38,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:38,266 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:38,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:30:38,271 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-09-21 11:30:38,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:38,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031459008] [2020-09-21 11:30:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:38,392 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:38,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-21 11:30:38,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:30:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 11:30:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:38,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:38,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:38,444 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:38,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:38,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:38,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:38,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:38,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:38,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:38,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:38,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:38,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:38,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:38,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:38,554 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:38,554 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:38,554 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:38,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:38,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:30:38,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 11:30:38,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:30:38,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:38,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:30:38,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:39,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031459008] [2020-09-21 11:30:39,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:39,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:30:39,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423461901] [2020-09-21 11:30:39,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:30:39,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:30:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:30:39,058 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-09-21 11:30:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:39,449 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-09-21 11:30:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:30:39,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-09-21 11:30:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:39,452 INFO L225 Difference]: With dead ends: 96 [2020-09-21 11:30:39,453 INFO L226 Difference]: Without dead ends: 74 [2020-09-21 11:30:39,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:30:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-21 11:30:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-09-21 11:30:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 11:30:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-09-21 11:30:39,458 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-09-21 11:30:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:39,459 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-09-21 11:30:39,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:30:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-09-21 11:30:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-21 11:30:39,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:39,460 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:39,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:30:39,460 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-09-21 11:30:39,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:39,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844735333] [2020-09-21 11:30:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,570 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,570 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,570 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 11:30:39,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-21 11:30:39,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:30:39,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:39,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:30:39,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:39,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,629 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,629 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:39,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,746 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,747 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 11:30:39,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 11:30:39,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:30:39,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:39,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:30:39,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:40,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844735333] [2020-09-21 11:30:40,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:40,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:30:40,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788747115] [2020-09-21 11:30:40,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:30:40,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:30:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:30:40,266 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-09-21 11:30:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:40,533 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-09-21 11:30:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:30:40,533 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-09-21 11:30:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:40,534 INFO L225 Difference]: With dead ends: 98 [2020-09-21 11:30:40,535 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 11:30:40,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:30:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 11:30:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-09-21 11:30:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 11:30:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-09-21 11:30:40,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-09-21 11:30:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-09-21 11:30:40,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:30:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-09-21 11:30:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:30:40,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:40,542 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:40,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:30:40,542 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:40,543 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-09-21 11:30:40,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:40,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731956310] [2020-09-21 11:30:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:40,660 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:40,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:40,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:40,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:40,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:30:40,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:40,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:40,719 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:40,720 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:40,720 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:40,720 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:40,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:40,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:40,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:40,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:40,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:40,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:40,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:40,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:40,867 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:40,868 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:40,868 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:40,869 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:40,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:30:40,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:40,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:30:40,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:30:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 11:30:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:41,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731956310] [2020-09-21 11:30:41,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:41,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:30:41,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016114665] [2020-09-21 11:30:41,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:30:41,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:30:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:30:41,467 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-09-21 11:30:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:41,826 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-09-21 11:30:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:30:41,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-09-21 11:30:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:41,828 INFO L225 Difference]: With dead ends: 100 [2020-09-21 11:30:41,828 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 11:30:41,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:30:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 11:30:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-09-21 11:30:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 11:30:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-09-21 11:30:41,835 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-09-21 11:30:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:41,835 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-09-21 11:30:41,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:30:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-09-21 11:30:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 11:30:41,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:41,836 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:41,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:30:41,836 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-09-21 11:30:41,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:41,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737018492] [2020-09-21 11:30:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:41,966 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:41,966 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:41,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:41,967 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:41,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 11:30:41,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 11:30:41,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:30:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 11:30:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:42,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:42,024 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:42,025 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:42,025 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:42,025 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:42,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:42,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:42,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:42,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:42,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:42,180 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:42,181 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:42,181 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:42,181 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:42,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 11:30:42,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-21 11:30:42,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:30:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-21 11:30:42,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:42,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737018492] [2020-09-21 11:30:42,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:42,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:30:42,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931249177] [2020-09-21 11:30:42,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:30:42,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:30:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:30:42,896 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-09-21 11:30:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:43,317 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-09-21 11:30:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:30:43,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-09-21 11:30:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:43,319 INFO L225 Difference]: With dead ends: 102 [2020-09-21 11:30:43,319 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 11:30:43,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:30:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 11:30:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-09-21 11:30:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 11:30:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-09-21 11:30:43,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-09-21 11:30:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:43,325 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-09-21 11:30:43,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:30:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-09-21 11:30:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 11:30:43,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:43,326 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:43,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:30:43,326 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-09-21 11:30:43,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:43,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803898249] [2020-09-21 11:30:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,461 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,461 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,461 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:30:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-21 11:30:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,531 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,531 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,532 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:43,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:43,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,676 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,676 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,676 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,677 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:30:43,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 11:30:43,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803898249] [2020-09-21 11:30:44,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:44,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:30:44,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777304654] [2020-09-21 11:30:44,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:30:44,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:30:44,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:30:44,307 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-09-21 11:30:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:44,672 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-09-21 11:30:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:30:44,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-09-21 11:30:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:44,674 INFO L225 Difference]: With dead ends: 104 [2020-09-21 11:30:44,674 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 11:30:44,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:30:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 11:30:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-09-21 11:30:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 11:30:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-09-21 11:30:44,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-09-21 11:30:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:44,680 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-09-21 11:30:44,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:30:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-09-21 11:30:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-21 11:30:44,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:44,682 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:44,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:30:44,682 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-09-21 11:30:44,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:44,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795264915] [2020-09-21 11:30:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:44,819 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:44,819 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:44,819 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:44,819 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:30:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:44,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:30:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:44,887 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:44,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:44,887 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:44,887 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:44,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:44,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:44,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:45,034 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:45,034 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:45,034 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:45,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:45,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 11:30:45,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 11:30:45,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:30:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:30:45,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:45,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795264915] [2020-09-21 11:30:45,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:45,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:30:45,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521391770] [2020-09-21 11:30:45,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:30:45,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:30:45,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:30:45,732 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-09-21 11:30:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:46,203 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-09-21 11:30:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:30:46,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-09-21 11:30:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:46,205 INFO L225 Difference]: With dead ends: 106 [2020-09-21 11:30:46,205 INFO L226 Difference]: Without dead ends: 84 [2020-09-21 11:30:46,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=423, Invalid=699, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:30:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-21 11:30:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-09-21 11:30:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 11:30:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-09-21 11:30:46,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-09-21 11:30:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:46,211 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-09-21 11:30:46,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:30:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-09-21 11:30:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 11:30:46,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:46,212 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:46,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:30:46,212 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-09-21 11:30:46,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:46,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901795272] [2020-09-21 11:30:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:46,353 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:46,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 11:30:46,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:30:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:30:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:46,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:46,413 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:46,413 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:46,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:46,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:46,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:46,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:46,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:46,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:46,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:46,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:46,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:46,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:46,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:46,562 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:46,562 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:46,562 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:46,563 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:46,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 11:30:46,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:46,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-21 11:30:46,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:30:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-21 11:30:46,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:48,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901795272] [2020-09-21 11:30:48,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:48,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:30:48,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585249993] [2020-09-21 11:30:48,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:30:48,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:30:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:30:48,301 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-09-21 11:30:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:48,832 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-09-21 11:30:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:30:48,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-09-21 11:30:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:48,834 INFO L225 Difference]: With dead ends: 108 [2020-09-21 11:30:48,834 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 11:30:48,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:30:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 11:30:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-21 11:30:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 11:30:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-09-21 11:30:48,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-09-21 11:30:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:48,841 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-09-21 11:30:48,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:30:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-09-21 11:30:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-21 11:30:48,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:48,842 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:30:48,842 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-09-21 11:30:48,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:48,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390131935] [2020-09-21 11:30:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:48,997 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-21 11:30:48,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:30:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-21 11:30:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:49,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:49,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:49,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:49,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:49,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:49,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:49,237 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:49,238 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:49,238 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:49,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:49,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:30:49,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:49,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-21 11:30:49,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:30:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:30:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:50,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390131935] [2020-09-21 11:30:50,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:50,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 11:30:50,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857754054] [2020-09-21 11:30:50,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 11:30:50,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 11:30:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:30:50,124 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-09-21 11:30:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:50,526 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-09-21 11:30:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:30:50,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-09-21 11:30:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:50,529 INFO L225 Difference]: With dead ends: 110 [2020-09-21 11:30:50,529 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 11:30:50,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=482, Invalid=778, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:30:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 11:30:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-09-21 11:30:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 11:30:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-09-21 11:30:50,540 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-09-21 11:30:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:50,541 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-09-21 11:30:50,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 11:30:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-09-21 11:30:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 11:30:50,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:50,543 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:50,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:30:50,543 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:50,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-09-21 11:30:50,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:50,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801688861] [2020-09-21 11:30:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:50,757 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:50,757 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:50,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:50,758 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:50,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 11:30:50,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:50,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-21 11:30:50,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:30:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:30:50,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:50,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:50,835 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:50,835 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:50,835 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:50,836 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:50,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:50,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:50,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:50,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:50,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:50,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:50,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:50,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:51,012 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:51,012 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:51,012 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:51,013 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:51,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:30:51,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-21 11:30:51,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:30:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 11:30:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:52,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801688861] [2020-09-21 11:30:52,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:52,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 11:30:52,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007332199] [2020-09-21 11:30:52,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 11:30:52,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 11:30:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:30:52,981 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-09-21 11:30:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:53,476 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-09-21 11:30:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:30:53,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-09-21 11:30:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:53,478 INFO L225 Difference]: With dead ends: 112 [2020-09-21 11:30:53,478 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 11:30:53,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:30:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 11:30:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-09-21 11:30:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 11:30:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-09-21 11:30:53,485 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-09-21 11:30:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:53,485 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-09-21 11:30:53,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 11:30:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-09-21 11:30:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 11:30:53,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:53,486 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:53,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:30:53,487 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-09-21 11:30:53,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:53,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214662538] [2020-09-21 11:30:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:53,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:53,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:53,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:53,656 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:30:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 11:30:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:53,725 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:53,725 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:53,725 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:53,726 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:53,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:53,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:53,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:53,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:53,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:53,876 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-21 11:30:53,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:30:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-21 11:30:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:54,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214662538] [2020-09-21 11:30:54,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:54,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 11:30:54,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737906640] [2020-09-21 11:30:54,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 11:30:54,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:54,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 11:30:54,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:30:54,884 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-09-21 11:30:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:55,435 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-09-21 11:30:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 11:30:55,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-09-21 11:30:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:55,437 INFO L225 Difference]: With dead ends: 114 [2020-09-21 11:30:55,437 INFO L226 Difference]: Without dead ends: 92 [2020-09-21 11:30:55,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:30:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-21 11:30:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-09-21 11:30:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:30:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-09-21 11:30:55,445 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-09-21 11:30:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:55,446 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-09-21 11:30:55,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 11:30:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-09-21 11:30:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 11:30:55,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:55,447 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:55,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 11:30:55,447 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-09-21 11:30:55,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:55,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985383000] [2020-09-21 11:30:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:55,616 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:55,617 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:55,617 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:55,617 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:55,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-21 11:30:55,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-21 11:30:55,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:55,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:55,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:55,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:55,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:55,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:55,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:55,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:55,852 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:55,853 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:55,853 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:55,853 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:55,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:30:55,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:57,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985383000] [2020-09-21 11:30:57,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:57,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 11:30:57,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979942117] [2020-09-21 11:30:57,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 11:30:57,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 11:30:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:30:57,971 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-09-21 11:30:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:58,441 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-09-21 11:30:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 11:30:58,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-09-21 11:30:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:58,442 INFO L225 Difference]: With dead ends: 116 [2020-09-21 11:30:58,442 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:30:58,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:30:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:30:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-09-21 11:30:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 11:30:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-09-21 11:30:58,452 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-09-21 11:30:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:58,452 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-09-21 11:30:58,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 11:30:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-09-21 11:30:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-21 11:30:58,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:58,453 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:58,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 11:30:58,453 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 23 times [2020-09-21 11:30:58,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:58,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29850946] [2020-09-21 11:30:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:58,620 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:58,620 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:58,620 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:30:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:58,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:58,684 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:58,685 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:58,685 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:58,685 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:58,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:58,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:58,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:58,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:30:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:58,851 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:58,852 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:58,852 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:58,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:58,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:30:58,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:58,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-21 11:30:58,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:30:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:30:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 11:30:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:31:01,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29850946] [2020-09-21 11:31:01,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:01,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-21 11:31:01,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278490216] [2020-09-21 11:31:01,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-21 11:31:01,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-21 11:31:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:31:01,067 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-09-21 11:31:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:01,682 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-09-21 11:31:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-21 11:31:01,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-09-21 11:31:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:01,684 INFO L225 Difference]: With dead ends: 118 [2020-09-21 11:31:01,684 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 11:31:01,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:31:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 11:31:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-09-21 11:31:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 11:31:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-09-21 11:31:01,692 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-09-21 11:31:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:01,693 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-09-21 11:31:01,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-21 11:31:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-09-21 11:31:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-21 11:31:01,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:01,694 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:01,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 11:31:01,694 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 24 times [2020-09-21 11:31:01,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:01,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98131099] [2020-09-21 11:31:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:01,860 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:31:01,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 11:31:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:01,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:01,942 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:01,942 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:01,942 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:01,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:01,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:01,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:31:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,174 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,175 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,175 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,175 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 11:31:02,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-21 11:31:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:31:03,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98131099] [2020-09-21 11:31:03,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:03,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-21 11:31:03,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818548885] [2020-09-21 11:31:03,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-21 11:31:03,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-21 11:31:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:31:03,265 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-09-21 11:31:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:03,733 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-09-21 11:31:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-21 11:31:03,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-09-21 11:31:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:03,735 INFO L225 Difference]: With dead ends: 120 [2020-09-21 11:31:03,735 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 11:31:03,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=647, Invalid=993, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 11:31:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 11:31:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-09-21 11:31:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 11:31:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-09-21 11:31:03,743 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-09-21 11:31:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:03,743 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-09-21 11:31:03,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-21 11:31:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-09-21 11:31:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-21 11:31:03,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:03,745 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:03,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-21 11:31:03,745 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 25 times [2020-09-21 11:31:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:03,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044751280] [2020-09-21 11:31:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:03,921 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:03,921 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:03,922 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:03,922 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:03,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-21 11:31:03,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-21 11:31:03,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:03,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-21 11:31:03,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:03,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-21 11:31:03,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,009 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,010 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,010 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:04,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:31:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,294 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,295 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,295 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 11:31:04,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-09-21 11:31:04,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-21 11:31:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:31:04,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 11:31:04,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:31:05,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044751280] [2020-09-21 11:31:05,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:05,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-21 11:31:05,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271641894] [2020-09-21 11:31:05,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-21 11:31:05,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-21 11:31:05,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:31:05,522 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-09-21 11:31:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,931 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-09-21 11:31:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-21 11:31:05,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-09-21 11:31:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,933 INFO L225 Difference]: With dead ends: 122 [2020-09-21 11:31:05,933 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 11:31:05,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=683, Invalid=1039, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 11:31:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 11:31:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-09-21 11:31:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-21 11:31:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-09-21 11:31:05,939 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-09-21 11:31:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,940 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-09-21 11:31:05,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-21 11:31:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-09-21 11:31:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 11:31:05,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:05,941 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:05,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-21 11:31:05,942 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 26 times [2020-09-21 11:31:05,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:05,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852215407] [2020-09-21 11:31:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,157 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,157 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-09-21 11:31:06,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-09-21 11:31:06,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:06,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 11:31:06,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,241 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,241 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,241 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,242 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:06,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:06,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:06,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:06,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:31:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:06,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:06,462 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:06,463 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:06,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:06,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:31:06,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:06,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-21 11:31:06,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-09-21 11:31:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:31:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-21 11:31:06,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:31:07,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852215407] [2020-09-21 11:31:07,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:07,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-21 11:31:07,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364505034] [2020-09-21 11:31:07,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-21 11:31:07,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-21 11:31:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:31:07,772 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-09-21 11:31:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:08,151 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-09-21 11:31:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-21 11:31:08,152 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-09-21 11:31:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:08,153 INFO L225 Difference]: With dead ends: 124 [2020-09-21 11:31:08,153 INFO L226 Difference]: Without dead ends: 102 [2020-09-21 11:31:08,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=720, Invalid=1086, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 11:31:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-21 11:31:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-09-21 11:31:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-21 11:31:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-09-21 11:31:08,160 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-09-21 11:31:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:08,160 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-09-21 11:31:08,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-21 11:31:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-09-21 11:31:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-21 11:31:08,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:08,162 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:08,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-21 11:31:08,162 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 27 times [2020-09-21 11:31:08,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:08,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743104458] [2020-09-21 11:31:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,378 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,378 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:31:08,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-21 11:31:08,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,449 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,449 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,449 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:08,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:31:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:08,659 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:08,660 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:08,660 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:08,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:08,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 11:31:08,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-21 11:31:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:31:11,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743104458] [2020-09-21 11:31:11,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:11,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-21 11:31:11,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44880624] [2020-09-21 11:31:11,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-21 11:31:11,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-21 11:31:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 11:31:11,411 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states.