/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:34:36,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:34:36,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:34:36,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:34:36,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:34:36,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:34:36,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:34:36,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:34:36,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:34:36,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:34:36,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:34:36,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:34:36,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:34:36,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:34:36,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:34:36,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:34:36,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:34:36,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:34:36,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:34:36,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:34:36,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:34:36,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:34:36,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:34:36,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:34:36,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:34:36,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:34:36,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:34:36,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:34:36,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:34:36,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 12:34:37,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:34:37,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:34:37,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:34:37,006 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 12:34:37,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:34:37,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:34:37,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:34:37,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:34:37,032 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:34:37,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:34:37,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:34:37,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:34:37,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:34:37,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:34:37,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:34:37,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:34:37,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:34:37,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:34:37,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:34:37,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:34:37,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:34:37,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:34:37,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:34:37,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:34:37,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:34:37,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:34:37,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:34:37,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:34:37,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:34:37,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:34:37,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:34:37,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:34:37,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:34:37,037 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:34:37,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:34:37,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:34:37,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:34:37,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:34:37,562 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:34:37,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-21 12:34:37,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1320710ec/8269ee141c4142e485a35fafe122559c/FLAG8ff6d0e1b [2020-09-21 12:34:38,171 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:34:38,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-21 12:34:38,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1320710ec/8269ee141c4142e485a35fafe122559c/FLAG8ff6d0e1b [2020-09-21 12:34:38,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1320710ec/8269ee141c4142e485a35fafe122559c [2020-09-21 12:34:38,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:34:38,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:34:38,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:38,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:34:38,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:34:38,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:38,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38, skipping insertion in model container [2020-09-21 12:34:38,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:38,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:34:38,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:34:38,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:38,917 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:34:38,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:38,954 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:34:38,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38 WrapperNode [2020-09-21 12:34:38,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:38,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:34:38,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:34:38,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:34:39,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (1/1) ... [2020-09-21 12:34:39,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:34:39,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:34:39,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:34:39,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:34:39,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (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 12:34:39,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:34:39,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:34:39,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:34:39,160 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-21 12:34:39,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:34:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:34:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:34:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:34:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:34:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:34:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:34:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:34:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:34:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:34:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:34:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:34:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:34:39,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:34:39,449 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:34:39,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:39 BoogieIcfgContainer [2020-09-21 12:34:39,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:34:39,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:34:39,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:34:39,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:34:39,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:38" (1/3) ... [2020-09-21 12:34:39,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e9053c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:39, skipping insertion in model container [2020-09-21 12:34:39,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:38" (2/3) ... [2020-09-21 12:34:39,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e9053c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:39, skipping insertion in model container [2020-09-21 12:34:39,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:39" (3/3) ... [2020-09-21 12:34:39,476 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-21 12:34:39,489 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:34:39,501 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:34:39,527 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:34:39,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:34:39,562 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:34:39,562 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:34:39,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:34:39,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:34:39,562 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:34:39,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:34:39,563 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:34:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 12:34:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:34:39,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:39,595 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 12:34:39,595 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-09-21 12:34:39,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:39,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862017500] [2020-09-21 12:34:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:34:40,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:40,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-09-21 12:34:40,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:34:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:34:40,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:40,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:34:40,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:40,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:40,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:40,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 12:34:40,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:40,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:40,291 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 12:34:40,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862017500] [2020-09-21 12:34:40,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:40,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:34:40,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885691626] [2020-09-21 12:34:40,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:34:40,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:34:40,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:34:40,325 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-09-21 12:34:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:40,478 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-09-21 12:34:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:34:40,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-21 12:34:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:40,494 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:34:40,494 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:34:40,499 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 12:34:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:34:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-21 12:34:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 12:34:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 12:34:40,548 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-09-21 12:34:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:40,548 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 12:34:40,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:34:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 12:34:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:34:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:40,550 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 12:34:40,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:34:40,550 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2020-09-21 12:34:40,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:40,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81630086] [2020-09-21 12:34:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:34:40,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-09-21 12:34:40,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:34:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:34:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:40,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:40,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:40,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:40,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:40,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:40,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:40,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:40,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:40,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:34:40,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:40,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:40,945 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 12:34:40,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81630086] [2020-09-21 12:34:40,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:40,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:40,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406115593] [2020-09-21 12:34:40,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:40,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:40,950 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-21 12:34:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:41,089 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-09-21 12:34:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:34:41,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 12:34:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:41,093 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:34:41,093 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:34:41,094 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 12:34:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:34:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-09-21 12:34:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:34:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 12:34:41,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-09-21 12:34:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:41,109 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 12:34:41,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 12:34:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:41,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:41,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:41,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:34:41,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1976547036, now seen corresponding path program 1 times [2020-09-21 12:34:41,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:41,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126883381] [2020-09-21 12:34:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:41,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-09-21 12:34:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:41,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:41,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:41,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:41,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:41,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 12:34:41,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:41,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:41,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126883381] [2020-09-21 12:34:41,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:41,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:41,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683182964] [2020-09-21 12:34:41,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:41,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:41,670 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-09-21 12:34:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:41,795 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-21 12:34:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:34:41,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:34:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:41,798 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:34:41,798 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 12:34:41,799 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 12:34:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 12:34:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-09-21 12:34:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:34:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-21 12:34:41,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2020-09-21 12:34:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:41,808 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-21 12:34:41,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-21 12:34:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:41,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:41,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:41,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:34:41,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1583520026, now seen corresponding path program 1 times [2020-09-21 12:34:41,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:41,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040664323] [2020-09-21 12:34:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:42,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-09-21 12:34:42,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:34:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:42,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:42,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:42,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:42,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:42,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:42,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:34:42,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:42,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040664323] [2020-09-21 12:34:42,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:42,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:34:42,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401516684] [2020-09-21 12:34:42,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:34:42,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:34:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:42,595 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-09-21 12:34:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:42,755 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-09-21 12:34:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:42,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 12:34:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:42,757 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:34:42,757 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:34:42,758 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 12:34:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:34:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-21 12:34:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 12:34:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 12:34:42,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2020-09-21 12:34:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:42,765 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 12:34:42,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:34:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 12:34:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:34:42,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:42,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:42,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:34:42,767 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash -596099560, now seen corresponding path program 1 times [2020-09-21 12:34:42,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:42,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374462981] [2020-09-21 12:34:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:34:43,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:34:43,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:34:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:43,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:43,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:43,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:43,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 12:34:43,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374462981] [2020-09-21 12:34:43,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:43,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:34:43,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454376880] [2020-09-21 12:34:43,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:34:43,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:34:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:43,941 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-09-21 12:34:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:44,115 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-21 12:34:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:34:44,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 12:34:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:44,117 INFO L225 Difference]: With dead ends: 57 [2020-09-21 12:34:44,117 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 12:34:44,118 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 12:34:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 12:34:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2020-09-21 12:34:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:34:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-09-21 12:34:44,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-09-21 12:34:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:44,126 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-09-21 12:34:44,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:34:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-09-21 12:34:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:34:44,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:44,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:44,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:34:44,128 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1373480502, now seen corresponding path program 2 times [2020-09-21 12:34:44,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:44,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346930952] [2020-09-21 12:34:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:34:45,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:34:45,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:45,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:45,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:45,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:45,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:45,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:45,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:45,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 12:34:45,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:45,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:45,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346930952] [2020-09-21 12:34:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:45,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:34:45,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673089968] [2020-09-21 12:34:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:34:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:34:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:45,298 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-09-21 12:34:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:45,456 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-09-21 12:34:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:45,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 12:34:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:45,458 INFO L225 Difference]: With dead ends: 65 [2020-09-21 12:34:45,458 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 12:34:45,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 12:34:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-09-21 12:34:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:34:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 12:34:45,466 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2020-09-21 12:34:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:45,466 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 12:34:45,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:34:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 12:34:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:34:45,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:45,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:45,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:34:45,468 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1865463592, now seen corresponding path program 3 times [2020-09-21 12:34:45,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:45,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858019580] [2020-09-21 12:34:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:34:46,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:34:46,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:46,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:46,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:46,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:46,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:46,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 12:34:46,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:46,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:46,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 12:34:46,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858019580] [2020-09-21 12:34:46,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:46,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:34:46,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195137044] [2020-09-21 12:34:46,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:34:46,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:34:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:46,741 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2020-09-21 12:34:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:46,922 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-09-21 12:34:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:34:46,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-21 12:34:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:46,924 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:34:46,924 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:34:46,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:34:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-21 12:34:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:34:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-09-21 12:34:46,933 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-09-21 12:34:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:46,935 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-09-21 12:34:46,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:34:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-09-21 12:34:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:34:46,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:46,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:34:46,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:34:46,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 484904918, now seen corresponding path program 4 times [2020-09-21 12:34:46,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:46,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740440962] [2020-09-21 12:34:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 12:34:47,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:47,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:34:47,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:34:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:34:47,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:48,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:48,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:48,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:34:48,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:48,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:48,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:48,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:48,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:34:48,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:48,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-21 12:34:48,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:48,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:48,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:48,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:48,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:34:48,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740440962] [2020-09-21 12:34:48,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:48,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:34:48,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921681266] [2020-09-21 12:34:48,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:34:48,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:34:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:48,175 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-09-21 12:34:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:48,355 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-09-21 12:34:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:34:48,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-21 12:34:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:48,357 INFO L225 Difference]: With dead ends: 75 [2020-09-21 12:34:48,357 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 12:34:48,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 12:34:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-09-21 12:34:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:34:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-09-21 12:34:48,371 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 33 [2020-09-21 12:34:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:48,371 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-09-21 12:34:48,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:34:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-09-21 12:34:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:34:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:48,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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 12:34:48,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:34:48,376 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash -833861812, now seen corresponding path program 5 times [2020-09-21 12:34:48,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:48,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152498597] [2020-09-21 12:34:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:34:49,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:34:49,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:49,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:49,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:49,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:34:49,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-21 12:34:49,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:34:49,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-21 12:34:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152498597] [2020-09-21 12:34:49,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:49,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:34:49,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355283393] [2020-09-21 12:34:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:34:49,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:34:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:49,592 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-09-21 12:34:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:49,735 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-09-21 12:34:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:34:49,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-09-21 12:34:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:49,736 INFO L225 Difference]: With dead ends: 72 [2020-09-21 12:34:49,737 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:34:49,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:34:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-21 12:34:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:34:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-21 12:34:49,742 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-09-21 12:34:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:49,743 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-21 12:34:49,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:34:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-21 12:34:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:34:49,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:49,744 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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 12:34:49,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:34:49,744 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash -913363186, now seen corresponding path program 6 times [2020-09-21 12:34:49,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:49,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226030340] [2020-09-21 12:34:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:50,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 12:34:50,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:50,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:50,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:34:50,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:50,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:50,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:50,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:50,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:50,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:50,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:50,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:50,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:51,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:34:51,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-21 12:34:51,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 12:34:51,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226030340] [2020-09-21 12:34:51,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:51,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:34:51,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285081940] [2020-09-21 12:34:51,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:34:51,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:34:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:51,014 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 9 states. [2020-09-21 12:34:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:51,205 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-09-21 12:34:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:34:51,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-21 12:34:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:51,207 INFO L225 Difference]: With dead ends: 85 [2020-09-21 12:34:51,207 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 12:34:51,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 12:34:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-09-21 12:34:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 12:34:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-21 12:34:51,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2020-09-21 12:34:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:51,225 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-21 12:34:51,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:34:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-21 12:34:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 12:34:51,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:51,226 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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 12:34:51,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:34:51,226 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 248855828, now seen corresponding path program 7 times [2020-09-21 12:34:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:51,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649416939] [2020-09-21 12:34:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:51,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 12:34:52,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:34:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:34:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:52,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:52,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:52,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:52,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:52,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:52,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:34:52,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-21 12:34:52,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:34:52,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-21 12:34:52,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649416939] [2020-09-21 12:34:52,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:52,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:34:52,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737342481] [2020-09-21 12:34:52,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:34:52,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:34:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:52,515 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 9 states. [2020-09-21 12:34:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:52,715 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-09-21 12:34:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:34:52,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-21 12:34:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:52,717 INFO L225 Difference]: With dead ends: 80 [2020-09-21 12:34:52,717 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:34:52,719 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 12:34:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:34:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-09-21 12:34:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 12:34:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-21 12:34:52,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2020-09-21 12:34:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:52,733 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-21 12:34:52,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:34:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-21 12:34:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 12:34:52,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:52,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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 12:34:52,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:34:52,738 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:52,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1196875410, now seen corresponding path program 8 times [2020-09-21 12:34:52,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:52,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351231816] [2020-09-21 12:34:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:53,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 12:34:53,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:53,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:34:53,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:53,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:53,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:34:53,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:53,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:53,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:53,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:34:53,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:53,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:53,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:53,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:34:53,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:53,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-21 12:34:53,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-21 12:34:54,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351231816] [2020-09-21 12:34:54,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:54,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:34:54,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070882901] [2020-09-21 12:34:54,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:34:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:34:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:54,079 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 10 states. [2020-09-21 12:34:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:54,235 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-21 12:34:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:34:54,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 12:34:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:54,237 INFO L225 Difference]: With dead ends: 82 [2020-09-21 12:34:54,237 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 12:34:54,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:34:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 12:34:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-09-21 12:34:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 12:34:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-21 12:34:54,245 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2020-09-21 12:34:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:54,245 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-21 12:34:54,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:34:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-21 12:34:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 12:34:54,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:54,248 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:54,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:34:54,248 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1710626960, now seen corresponding path program 9 times [2020-09-21 12:34:54,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:54,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788791518] [2020-09-21 12:34:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:54,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 12:34:55,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:34:55,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-21 12:34:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:34:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:55,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:34:55,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-09-21 12:34:55,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:55,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:55,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 12:34:55,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788791518] [2020-09-21 12:34:55,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:55,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:34:55,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282450181] [2020-09-21 12:34:55,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:34:55,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:34:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:55,556 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 10 states. [2020-09-21 12:34:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:55,794 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-09-21 12:34:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:34:55,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-09-21 12:34:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:55,797 INFO L225 Difference]: With dead ends: 97 [2020-09-21 12:34:55,797 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 12:34:55,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 12:34:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 53. [2020-09-21 12:34:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 12:34:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-09-21 12:34:55,814 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2020-09-21 12:34:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:55,815 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-09-21 12:34:55,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:34:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-09-21 12:34:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:34:55,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:55,817 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 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 12:34:55,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:34:55,818 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1160459182, now seen corresponding path program 10 times [2020-09-21 12:34:55,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:55,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906656719] [2020-09-21 12:34:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:56,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:34:56,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:56,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:56,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:56,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:34:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:56,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:56,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:56,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:56,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:56,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:56,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:56,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:56,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:56,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:56,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:56,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:56,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:57,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:34:57,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:57,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-09-21 12:34:57,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:57,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:34:57,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:57,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:34:57,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-21 12:34:57,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906656719] [2020-09-21 12:34:57,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:57,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:34:57,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614997475] [2020-09-21 12:34:57,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:34:57,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:34:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:57,238 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 11 states. [2020-09-21 12:34:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:57,411 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-09-21 12:34:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:34:57,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-21 12:34:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:57,413 INFO L225 Difference]: With dead ends: 90 [2020-09-21 12:34:57,413 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 12:34:57,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:34:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 12:34:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-21 12:34:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 12:34:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-21 12:34:57,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-09-21 12:34:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:57,422 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-21 12:34:57,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:34:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-21 12:34:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:34:57,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:57,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:57,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:34:57,424 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -582999788, now seen corresponding path program 11 times [2020-09-21 12:34:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:57,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943264690] [2020-09-21 12:34:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:57,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 12:34:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:34:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:34:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 12:34:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:34:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:58,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:58,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:58,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:58,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:58,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:58,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:34:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:58,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-09-21 12:34:58,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-21 12:34:58,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943264690] [2020-09-21 12:34:58,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:58,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:34:58,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803926490] [2020-09-21 12:34:58,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:34:58,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:58,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:34:58,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:58,833 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 11 states. [2020-09-21 12:34:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:59,048 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-09-21 12:34:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:34:59,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-09-21 12:34:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:59,049 INFO L225 Difference]: With dead ends: 107 [2020-09-21 12:34:59,050 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 12:34:59,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:34:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 12:34:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2020-09-21 12:34:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 12:34:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-09-21 12:34:59,060 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-09-21 12:34:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-09-21 12:34:59,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:34:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-09-21 12:34:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:34:59,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:59,061 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 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 12:34:59,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:34:59,061 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:59,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1960196786, now seen corresponding path program 12 times [2020-09-21 12:34:59,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:59,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178775421] [2020-09-21 12:34:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:35:00,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:35:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 12:35:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:35:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:00,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:00,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:00,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:00,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:00,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-09-21 12:35:00,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:00,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:00,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:00,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-21 12:35:00,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178775421] [2020-09-21 12:35:00,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:00,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:00,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113581604] [2020-09-21 12:35:00,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:00,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:00,451 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 12 states. [2020-09-21 12:35:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:00,684 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-09-21 12:35:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:00,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-21 12:35:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:00,686 INFO L225 Difference]: With dead ends: 115 [2020-09-21 12:35:00,686 INFO L226 Difference]: Without dead ends: 103 [2020-09-21 12:35:00,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-21 12:35:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-09-21 12:35:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 12:35:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-21 12:35:00,697 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2020-09-21 12:35:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:00,698 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-21 12:35:00,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-21 12:35:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 12:35:00,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:00,700 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 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 12:35:00,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:35:00,700 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -213385516, now seen corresponding path program 13 times [2020-09-21 12:35:00,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:00,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488251920] [2020-09-21 12:35:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:01,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 12:35:01,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:35:01,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:35:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:01,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:01,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:01,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:01,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:01,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:01,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:01,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:01,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:01,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:01,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:02,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:02,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-21 12:35:02,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:35:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:35:02,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-09-21 12:35:02,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488251920] [2020-09-21 12:35:02,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:02,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:02,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648359212] [2020-09-21 12:35:02,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:02,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:02,140 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 12 states. [2020-09-21 12:35:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:02,340 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-09-21 12:35:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:35:02,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-09-21 12:35:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:02,342 INFO L225 Difference]: With dead ends: 104 [2020-09-21 12:35:02,342 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 12:35:02,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:35:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 12:35:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-21 12:35:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 12:35:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-09-21 12:35:02,349 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-09-21 12:35:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:02,349 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-09-21 12:35:02,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-09-21 12:35:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 12:35:02,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:02,350 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 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 12:35:02,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:35:02,350 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1257992598, now seen corresponding path program 14 times [2020-09-21 12:35:02,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:02,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119370814] [2020-09-21 12:35:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:03,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:35:03,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-09-21 12:35:03,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:03,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:35:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:35:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:03,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:03,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:03,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:03,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:03,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:35:03,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:03,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-09-21 12:35:03,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:03,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 12:35:03,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119370814] [2020-09-21 12:35:03,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:03,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:35:03,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765630198] [2020-09-21 12:35:03,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:35:03,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:03,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:35:03,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:03,831 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 13 states. [2020-09-21 12:35:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:04,090 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-09-21 12:35:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:35:04,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-09-21 12:35:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:04,092 INFO L225 Difference]: With dead ends: 125 [2020-09-21 12:35:04,092 INFO L226 Difference]: Without dead ends: 113 [2020-09-21 12:35:04,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:35:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-21 12:35:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-21 12:35:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 12:35:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-09-21 12:35:04,103 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-09-21 12:35:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:04,103 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-09-21 12:35:04,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:35:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-09-21 12:35:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 12:35:04,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:04,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 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 12:35:04,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:35:04,104 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 606571916, now seen corresponding path program 15 times [2020-09-21 12:35:04,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:04,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261812441] [2020-09-21 12:35:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:04,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:35:05,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:05,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:05,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:05,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:05,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:05,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:05,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:35:05,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:05,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-21 12:35:05,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:35:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:35:05,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-09-21 12:35:05,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261812441] [2020-09-21 12:35:05,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:05,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:35:05,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073310693] [2020-09-21 12:35:05,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:35:05,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:35:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:05,657 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 13 states. [2020-09-21 12:35:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:05,865 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-09-21 12:35:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:35:05,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-21 12:35:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:05,866 INFO L225 Difference]: With dead ends: 112 [2020-09-21 12:35:05,866 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 12:35:05,867 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 12:35:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 12:35:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-09-21 12:35:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 12:35:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-09-21 12:35:05,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2020-09-21 12:35:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:05,877 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-09-21 12:35:05,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:35:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-09-21 12:35:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:35:05,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:05,877 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 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 12:35:05,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:35:05,878 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2010612746, now seen corresponding path program 16 times [2020-09-21 12:35:05,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:05,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002992580] [2020-09-21 12:35:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:05,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:06,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 12:35:06,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:06,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:35:06,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 12:35:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-21 12:35:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-21 12:35:06,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:07,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:07,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:07,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:07,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:07,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:07,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:07,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:07,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:07,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:07,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-09-21 12:35:07,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 12:35:07,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002992580] [2020-09-21 12:35:07,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:07,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 12:35:07,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088590045] [2020-09-21 12:35:07,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:35:07,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:35:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:35:07,429 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 14 states. [2020-09-21 12:35:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:07,761 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-09-21 12:35:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:35:07,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-21 12:35:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:07,763 INFO L225 Difference]: With dead ends: 135 [2020-09-21 12:35:07,763 INFO L226 Difference]: Without dead ends: 123 [2020-09-21 12:35:07,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:35:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-21 12:35:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-09-21 12:35:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 12:35:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-09-21 12:35:07,779 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 63 [2020-09-21 12:35:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:07,779 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-09-21 12:35:07,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:35:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-09-21 12:35:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 12:35:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:07,782 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 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 12:35:07,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:35:07,782 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2110851432, now seen corresponding path program 17 times [2020-09-21 12:35:07,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:07,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727354516] [2020-09-21 12:35:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:07,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:08,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 12:35:08,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:35:08,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:08,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 12:35:08,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:08,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:08,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:08,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:08,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:08,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:08,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:08,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:09,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:09,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-09-21 12:35:09,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:09,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:35:09,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-09-21 12:35:09,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727354516] [2020-09-21 12:35:09,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:09,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:09,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055586140] [2020-09-21 12:35:09,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:09,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:09,956 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 12 states. [2020-09-21 12:35:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:10,341 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-09-21 12:35:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:10,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-09-21 12:35:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:10,343 INFO L225 Difference]: With dead ends: 71 [2020-09-21 12:35:10,343 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:35:10,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:35:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:35:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:35:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:35:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:35:10,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-21 12:35:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:10,346 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:35:10,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:35:10,347 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:35:10,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:35:10,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:35:10,724 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-09-21 12:35:10,732 INFO L264 CegarLoopResult]: At program point initENTRY(lines 9 16) the Hoare annotation is: (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(#length)| |#length|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:10,733 INFO L268 CegarLoopResult]: For program point initEXIT(lines 9 16) no Hoare annotation was computed. [2020-09-21 12:35:10,733 INFO L268 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-09-21 12:35:10,734 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (let ((.cse0 (= init_~a.offset |init_#in~a.offset|)) (.cse3 (<= |init_#in~size| init_~size)) (.cse5 (= init_~a.base |init_#in~a.base|)) (.cse4 (<= init_~size |init_#in~size|))) (or (let ((.cse1 (* 4 init_~i~0)) (.cse2 (* 4 init_~size))) (and .cse0 (<= .cse1 .cse2) .cse3 (or (< .cse1 .cse2) (not (= (select (select |#memory_$Pointer$.base| |init_#in~a.base|) (+ (* |init_#in~size| 4) |init_#in~a.offset| (- 4))) 0))) .cse4 .cse5)) (and .cse0 (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= (+ |init_#in~size| init_~i~0) init_~size) (= |old(#length)| |#length|) .cse3 .cse5 .cse4 (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)))) [2020-09-21 12:35:10,734 INFO L268 CegarLoopResult]: For program point L12-4(lines 9 16) no Hoare annotation was computed. [2020-09-21 12:35:10,734 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:10,735 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:10,735 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:10,735 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:10,735 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:35:10,735 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:35:10,736 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:10,736 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-09-21 12:35:10,736 INFO L268 CegarLoopResult]: For program point L31-2(lines 31 35) no Hoare annotation was computed. [2020-09-21 12:35:10,736 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 35) the Hoare annotation is: (<= 1 main_~flag~0) [2020-09-21 12:35:10,736 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 35) no Hoare annotation was computed. [2020-09-21 12:35:10,737 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-09-21 12:35:10,737 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-09-21 12:35:10,737 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-21 12:35:10,737 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-09-21 12:35:10,737 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: false [2020-09-21 12:35:10,738 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-09-21 12:35:10,738 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(#length)| |#length|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:10,738 INFO L268 CegarLoopResult]: For program point L26(lines 26 29) no Hoare annotation was computed. [2020-09-21 12:35:10,738 INFO L268 CegarLoopResult]: For program point L24-2(lines 24 30) no Hoare annotation was computed. [2020-09-21 12:35:10,739 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 30) the Hoare annotation is: (or (<= 1 main_~flag~0) (and (not (= (select (select |#memory_$Pointer$.base| |main_~#a~0.base|) (+ |main_~#a~0.offset| 399996)) 0)) (<= main_~i~1 99999))) [2020-09-21 12:35:10,739 INFO L268 CegarLoopResult]: For program point L24-4(lines 24 30) no Hoare annotation was computed. [2020-09-21 12:35:10,739 INFO L268 CegarLoopResult]: For program point L4-3(line 4) no Hoare annotation was computed. [2020-09-21 12:35:10,739 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2020-09-21 12:35:10,739 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 4) no Hoare annotation was computed. [2020-09-21 12:35:10,740 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 12:35:10,740 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-21 12:35:10,740 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-09-21 12:35:10,769 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,771 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,772 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,772 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,777 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,778 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,779 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,779 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,780 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,780 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,781 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,781 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,781 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,782 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,782 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,783 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,788 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,789 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,789 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,790 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,790 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,791 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,791 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,792 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,792 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,793 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,793 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,793 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:10 BoogieIcfgContainer [2020-09-21 12:35:10,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:10,811 INFO L168 Benchmark]: Toolchain (without parser) took 32243.60 ms. Allocated memory was 139.5 MB in the beginning and 414.2 MB in the end (delta: 274.7 MB). Free memory was 102.7 MB in the beginning and 165.7 MB in the end (delta: -63.0 MB). Peak memory consumption was 211.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,813 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.77 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,814 INFO L168 Benchmark]: Boogie Preprocessor took 126.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,822 INFO L168 Benchmark]: RCFGBuilder took 383.70 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,823 INFO L168 Benchmark]: TraceAbstraction took 31329.77 ms. Allocated memory was 201.9 MB in the beginning and 414.2 MB in the end (delta: 212.3 MB). Free memory was 161.7 MB in the beginning and 165.7 MB in the end (delta: -4.0 MB). Peak memory consumption was 208.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:10,831 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 393.77 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.70 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31329.77 ms. Allocated memory was 201.9 MB in the beginning and 414.2 MB in the end (delta: 212.3 MB). Free memory was 161.7 MB in the beginning and 165.7 MB in the end (delta: -4.0 MB). Peak memory consumption was 208.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 <= flag - InvariantResult [Line: 24]: Loop Invariant [2020-09-21 12:35:10,844 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,855 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,856 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: 1 <= flag || (!(#memory_$Pointer$[a][a + 399996] == 0) && i <= 99999) - InvariantResult [Line: 12]: Loop Invariant [2020-09-21 12:35:10,857 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,857 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,857 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,858 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,861 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,863 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,863 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,864 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,866 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:10,866 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,867 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:10,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,869 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:10,870 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:10,870 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: (((((a == a && 4 * i <= 4 * size) && \old(size) <= size) && (4 * i < 4 * size || !(#memory_$Pointer$[a][\old(size) * 4 + a + -4] == 0))) && size <= \old(size)) && a == a) || ((((((((a == a && #memory_$Pointer$ == \old(#memory_$Pointer$)) && \old(size) + i <= size) && \old(unknown-#length-unknown) == unknown-#length-unknown) && \old(size) <= size) && a == a) && size <= \old(size)) && #memory_$Pointer$ == \old(#memory_$Pointer$)) && \old(\valid) == \valid) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.7s, OverallIterations: 21, TraceHistogramMax: 10, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 568 SDtfs, 659 SDslu, 1971 SDs, 0 SdLazy, 2323 SolverSat, 330 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 312 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 31 PreInvPairs, 52 NumberOfFragments, 134 HoareAnnotationTreeSize, 31 FomulaSimplifications, 504 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 840 ConstructedInterpolants, 0 QuantifiedInterpolants, 124356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 757/1345 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...