/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:29,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:29,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:29,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:29,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:29,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:29,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:29,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:29,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:29,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:29,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:29,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:29,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:29,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:29,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:29,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:29,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:29,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:29,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:29,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:29,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:29,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:29,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:29,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:29,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:29,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:29,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:29,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:29,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:29,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:29,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:29,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:29,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:29,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:29,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:29,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:29,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:29,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:29,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:29,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:29,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:29,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:25:29,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:29,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:29,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:29,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:29,964 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:29,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:29,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:29,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:29,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:29,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:29,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:29,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:29,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:29,967 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:29,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:29,967 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:29,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:29,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:29,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:29,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:29,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:29,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:29,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:29,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:29,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:29,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:29,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:29,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:29,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:29,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:30,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:30,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:30,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:30,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:30,455 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:30,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-26 19:25:30,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf2a9d7f7/1921bb068d5b47e2997bfa8882b822d1/FLAGd964e1ec3 [2020-10-26 19:25:31,151 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:31,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-26 19:25:31,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf2a9d7f7/1921bb068d5b47e2997bfa8882b822d1/FLAGd964e1ec3 [2020-10-26 19:25:31,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf2a9d7f7/1921bb068d5b47e2997bfa8882b822d1 [2020-10-26 19:25:31,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:31,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:31,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:31,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:31,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:31,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769c2510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31, skipping insertion in model container [2020-10-26 19:25:31,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:31,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:31,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:31,835 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:31,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:31,908 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:31,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31 WrapperNode [2020-10-26 19:25:31,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:31,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:31,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:31,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:31,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:31,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... [2020-10-26 19:25:32,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:32,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:32,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:32,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:32,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:32,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:32,717 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:32,718 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-26 19:25:32,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:32 BoogieIcfgContainer [2020-10-26 19:25:32,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:32,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:32,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:32,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:32,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:31" (1/3) ... [2020-10-26 19:25:32,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725be2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:32, skipping insertion in model container [2020-10-26 19:25:32,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:31" (2/3) ... [2020-10-26 19:25:32,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725be2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:32, skipping insertion in model container [2020-10-26 19:25:32,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:32" (3/3) ... [2020-10-26 19:25:32,729 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2020-10-26 19:25:32,742 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:32,747 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:32,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:32,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:32,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:32,787 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:32,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:32,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:32,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:32,787 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:32,787 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-26 19:25:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:25:32,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:32,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:32,814 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1772990658, now seen corresponding path program 1 times [2020-10-26 19:25:32,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:32,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319735762] [2020-10-26 19:25:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:25:35,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:25:35,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-26 19:25:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:35,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:35,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:35,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:35,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:35,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319735762] [2020-10-26 19:25:35,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:35,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006372654] [2020-10-26 19:25:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:35,680 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-10-26 19:25:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:35,875 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2020-10-26 19:25:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:35,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 19:25:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:35,886 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:25:35,886 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:25:35,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:25:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:25:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:25:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-26 19:25:35,939 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 29 [2020-10-26 19:25:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:35,939 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-26 19:25:35,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-26 19:25:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:25:35,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:35,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:35,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:35,942 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1440650294, now seen corresponding path program 1 times [2020-10-26 19:25:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:35,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955150424] [2020-10-26 19:25:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:40,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:25:40,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:25:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:25:40,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:40,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:41,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:41,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:41,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:41,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:41,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:25:41,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955150424] [2020-10-26 19:25:41,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:41,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:41,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878636411] [2020-10-26 19:25:41,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:41,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:41,088 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-10-26 19:25:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:41,266 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-26 19:25:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:41,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-26 19:25:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:41,269 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:25:41,269 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:25:41,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:25:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:25:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:25:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-26 19:25:41,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 37 [2020-10-26 19:25:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:41,287 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-26 19:25:41,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-26 19:25:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:25:41,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:41,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:41,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:41,293 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1729417274, now seen corresponding path program 2 times [2020-10-26 19:25:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:41,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965770091] [2020-10-26 19:25:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:25:46,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:46,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:46,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:46,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:46,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:46,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:25:46,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965770091] [2020-10-26 19:25:46,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:46,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:46,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370984205] [2020-10-26 19:25:46,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:46,415 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2020-10-26 19:25:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:46,623 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-26 19:25:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:46,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-26 19:25:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:46,625 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:25:46,625 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:25:46,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:25:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:25:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:25:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-26 19:25:46,636 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2020-10-26 19:25:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:46,637 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-26 19:25:46,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-26 19:25:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:25:46,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:46,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:46,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:46,639 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash 620300470, now seen corresponding path program 3 times [2020-10-26 19:25:46,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:46,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896833158] [2020-10-26 19:25:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:46,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:51,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:51,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:25:51,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:25:51,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:51,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:51,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:51,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:51,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:51,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:51,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:51,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:51,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:51,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:25:51,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:51,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:51,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:51,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:51,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:25:51,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896833158] [2020-10-26 19:25:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652299073] [2020-10-26 19:25:51,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:51,786 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 7 states. [2020-10-26 19:25:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:52,079 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-26 19:25:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:52,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-26 19:25:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:52,082 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:25:52,082 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:25:52,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:25:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:25:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:25:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-26 19:25:52,104 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 53 [2020-10-26 19:25:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:52,104 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-26 19:25:52,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-26 19:25:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:25:52,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:52,107 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:52,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:52,108 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1183117498, now seen corresponding path program 4 times [2020-10-26 19:25:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380654149] [2020-10-26 19:25:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:52,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:25:57,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:57,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:57,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:57,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:57,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:57,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:57,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:25:57,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380654149] [2020-10-26 19:25:57,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:57,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:57,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945699554] [2020-10-26 19:25:57,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:57,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:57,277 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 8 states. [2020-10-26 19:25:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:57,525 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-26 19:25:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:57,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-26 19:25:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:57,527 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:25:57,527 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:25:57,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:25:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:25:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:25:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-26 19:25:57,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 61 [2020-10-26 19:25:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:57,547 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-26 19:25:57,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-26 19:25:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:25:57,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:57,552 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:57,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:57,552 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash -608395978, now seen corresponding path program 5 times [2020-10-26 19:25:57,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:57,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54385643] [2020-10-26 19:25:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:26:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:02,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:26:02,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:26:02,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:02,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:02,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:02,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:26:02,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54385643] [2020-10-26 19:26:02,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:02,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:26:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863303448] [2020-10-26 19:26:02,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:26:02,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:26:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:02,764 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 9 states. [2020-10-26 19:26:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:03,050 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-26 19:26:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:26:03,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-26 19:26:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:03,054 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:26:03,054 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:26:03,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:26:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:26:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:26:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-26 19:26:03,074 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 69 [2020-10-26 19:26:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:03,075 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-26 19:26:03,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:26:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-26 19:26:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:26:03,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:03,080 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:03,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:26:03,081 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1558671674, now seen corresponding path program 6 times [2020-10-26 19:26:03,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:03,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117375016] [2020-10-26 19:26:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:26:08,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:08,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:26:08,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:08,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:08,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:08,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:08,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:08,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:08,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:26:08,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117375016] [2020-10-26 19:26:08,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:08,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:08,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871611987] [2020-10-26 19:26:08,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:08,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:08,260 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 10 states. [2020-10-26 19:26:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:08,554 INFO L93 Difference]: Finished difference Result 159 states and 182 transitions. [2020-10-26 19:26:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:08,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-26 19:26:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:08,556 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:26:08,556 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:26:08,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:26:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:26:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:26:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-10-26 19:26:08,568 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 77 [2020-10-26 19:26:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:08,569 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-10-26 19:26:08,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-10-26 19:26:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:26:08,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:08,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:08,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:08,571 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash -909553226, now seen corresponding path program 7 times [2020-10-26 19:26:08,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:08,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399721812] [2020-10-26 19:26:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:26:13,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:13,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:13,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:26:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:13,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:13,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:13,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:13,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:14,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-26 19:26:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399721812] [2020-10-26 19:26:14,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:14,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:14,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910467597] [2020-10-26 19:26:14,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:14,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:14,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:14,023 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 11 states. [2020-10-26 19:26:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:14,438 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2020-10-26 19:26:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:14,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-26 19:26:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:14,440 INFO L225 Difference]: With dead ends: 174 [2020-10-26 19:26:14,440 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:26:14,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:26:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-26 19:26:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:26:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2020-10-26 19:26:14,469 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 85 [2020-10-26 19:26:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:14,469 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2020-10-26 19:26:14,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2020-10-26 19:26:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:26:14,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:14,470 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:14,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:14,477 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash 119296442, now seen corresponding path program 8 times [2020-10-26 19:26:14,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:14,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868483694] [2020-10-26 19:26:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:26:19,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:19,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:19,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-26 19:26:19,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868483694] [2020-10-26 19:26:19,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:19,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320608379] [2020-10-26 19:26:19,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:19,677 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 12 states. [2020-10-26 19:26:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:20,118 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2020-10-26 19:26:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:20,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-10-26 19:26:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:20,120 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:26:20,120 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:26:20,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:26:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-26 19:26:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:26:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-10-26 19:26:20,148 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 93 [2020-10-26 19:26:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:20,152 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-10-26 19:26:20,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-10-26 19:26:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:26:20,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:20,155 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:20,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:20,155 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash -591452618, now seen corresponding path program 9 times [2020-10-26 19:26:20,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:20,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698851111] [2020-10-26 19:26:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:26:25,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:25,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:25,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:25,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:25,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:25,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:25,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-26 19:26:25,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698851111] [2020-10-26 19:26:25,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:25,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045694258] [2020-10-26 19:26:25,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:25,389 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 13 states. [2020-10-26 19:26:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:25,739 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2020-10-26 19:26:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:25,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-26 19:26:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:25,741 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:26:25,741 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:26:25,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:26:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-26 19:26:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:26:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2020-10-26 19:26:25,751 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 101 [2020-10-26 19:26:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:25,751 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2020-10-26 19:26:25,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2020-10-26 19:26:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:26:25,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:25,753 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:25,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:25,753 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:25,754 INFO L82 PathProgramCache]: Analyzing trace with hash 604213818, now seen corresponding path program 10 times [2020-10-26 19:26:25,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:25,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691369860] [2020-10-26 19:26:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:30,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:30,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-26 19:26:30,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691369860] [2020-10-26 19:26:30,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:30,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254272946] [2020-10-26 19:26:30,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:30,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:30,988 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand 14 states. [2020-10-26 19:26:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:31,318 INFO L93 Difference]: Finished difference Result 219 states and 242 transitions. [2020-10-26 19:26:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:31,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 109 [2020-10-26 19:26:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:31,320 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:26:31,320 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:26:31,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:26:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:26:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:26:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2020-10-26 19:26:31,330 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 109 [2020-10-26 19:26:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:31,330 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2020-10-26 19:26:31,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2020-10-26 19:26:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:26:31,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:31,335 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:31,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:31,335 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1606542666, now seen corresponding path program 11 times [2020-10-26 19:26:31,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:31,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313019949] [2020-10-26 19:26:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:31,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:36,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:36,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:36,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:36,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:36,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-26 19:26:36,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313019949] [2020-10-26 19:26:36,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:36,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:36,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248824217] [2020-10-26 19:26:36,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:36,602 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 15 states. [2020-10-26 19:26:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:37,047 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2020-10-26 19:26:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:37,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-26 19:26:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:37,049 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:26:37,049 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:26:37,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:26:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:26:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:26:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-26 19:26:37,058 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 117 [2020-10-26 19:26:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:37,059 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-26 19:26:37,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-26 19:26:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:26:37,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:37,060 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:37,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:37,061 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 343749306, now seen corresponding path program 12 times [2020-10-26 19:26:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:37,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785133938] [2020-10-26 19:26:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:37,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:42,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:42,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:42,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-26 19:26:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785133938] [2020-10-26 19:26:42,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:42,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343969789] [2020-10-26 19:26:42,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:42,332 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 16 states. [2020-10-26 19:26:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:42,794 INFO L93 Difference]: Finished difference Result 249 states and 272 transitions. [2020-10-26 19:26:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:42,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2020-10-26 19:26:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:42,801 INFO L225 Difference]: With dead ends: 249 [2020-10-26 19:26:42,801 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:26:42,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:26:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:26:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:26:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-26 19:26:42,817 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 125 [2020-10-26 19:26:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:42,817 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-26 19:26:42,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-26 19:26:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:26:42,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:42,819 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:42,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:42,819 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1038495542, now seen corresponding path program 13 times [2020-10-26 19:26:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:42,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809009664] [2020-10-26 19:26:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:47,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:48,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:48,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-26 19:26:48,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809009664] [2020-10-26 19:26:48,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:48,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628110857] [2020-10-26 19:26:48,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:48,110 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 17 states. [2020-10-26 19:26:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:48,495 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2020-10-26 19:26:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:48,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-26 19:26:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:48,497 INFO L225 Difference]: With dead ends: 264 [2020-10-26 19:26:48,497 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:26:48,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:26:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-26 19:26:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:26:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2020-10-26 19:26:48,509 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 133 [2020-10-26 19:26:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:48,509 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2020-10-26 19:26:48,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2020-10-26 19:26:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 19:26:48,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:48,511 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:48,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:48,512 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1150733510, now seen corresponding path program 14 times [2020-10-26 19:26:48,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:48,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338275664] [2020-10-26 19:26:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:48,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:53,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2020-10-26 19:26:53,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338275664] [2020-10-26 19:26:53,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:53,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614736209] [2020-10-26 19:26:53,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:53,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:53,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:53,834 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 18 states. [2020-10-26 19:26:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:54,350 INFO L93 Difference]: Finished difference Result 279 states and 302 transitions. [2020-10-26 19:26:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:54,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-26 19:26:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:54,352 INFO L225 Difference]: With dead ends: 279 [2020-10-26 19:26:54,352 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:26:54,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:26:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-26 19:26:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:26:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-26 19:26:54,362 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 141 [2020-10-26 19:26:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:54,363 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-26 19:26:54,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-26 19:26:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:26:54,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:54,365 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:54,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:54,365 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2102879158, now seen corresponding path program 15 times [2020-10-26 19:26:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:54,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421917085] [2020-10-26 19:26:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:26:59,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:59,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-26 19:26:59,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421917085] [2020-10-26 19:26:59,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:59,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:59,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747332124] [2020-10-26 19:26:59,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:59,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:59,716 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand 19 states. [2020-10-26 19:27:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:00,168 INFO L93 Difference]: Finished difference Result 294 states and 317 transitions. [2020-10-26 19:27:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:27:00,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-10-26 19:27:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:00,170 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:27:00,170 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:27:00,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:27:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:27:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-26 19:27:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:27:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2020-10-26 19:27:00,182 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 149 [2020-10-26 19:27:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:00,182 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2020-10-26 19:27:00,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:27:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2020-10-26 19:27:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:27:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:00,184 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:00,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:27:00,184 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2108134330, now seen corresponding path program 16 times [2020-10-26 19:27:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776992907] [2020-10-26 19:27:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:00,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:05,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:27:05,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:05,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:05,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:27:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:27:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:05,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:05,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:05,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-26 19:27:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776992907] [2020-10-26 19:27:05,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:05,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:27:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492129809] [2020-10-26 19:27:05,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:27:05,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:27:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:05,564 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand 20 states. [2020-10-26 19:27:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:06,088 INFO L93 Difference]: Finished difference Result 309 states and 332 transitions. [2020-10-26 19:27:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:27:06,089 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2020-10-26 19:27:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:06,091 INFO L225 Difference]: With dead ends: 309 [2020-10-26 19:27:06,091 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:27:06,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:27:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:27:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-26 19:27:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:27:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-26 19:27:06,102 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 157 [2020-10-26 19:27:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:06,102 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-26 19:27:06,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:27:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-26 19:27:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:27:06,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:06,105 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:06,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:27:06,105 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1003374538, now seen corresponding path program 17 times [2020-10-26 19:27:06,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:06,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366459856] [2020-10-26 19:27:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:06,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:27:11,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:11,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:11,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:11,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-26 19:27:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366459856] [2020-10-26 19:27:11,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:11,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:27:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957675330] [2020-10-26 19:27:11,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:27:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:27:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:11,495 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 21 states. [2020-10-26 19:27:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:12,075 INFO L93 Difference]: Finished difference Result 324 states and 347 transitions. [2020-10-26 19:27:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:27:12,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 165 [2020-10-26 19:27:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:12,077 INFO L225 Difference]: With dead ends: 324 [2020-10-26 19:27:12,077 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:27:12,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:27:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-26 19:27:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:27:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 186 transitions. [2020-10-26 19:27:12,095 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 186 transitions. Word has length 165 [2020-10-26 19:27:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:12,095 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 186 transitions. [2020-10-26 19:27:12,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:27:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 186 transitions. [2020-10-26 19:27:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:27:12,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:12,098 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:12,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:27:12,098 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1108890682, now seen corresponding path program 18 times [2020-10-26 19:27:12,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:12,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261961851] [2020-10-26 19:27:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:17,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:27:17,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:17,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:17,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:17,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:17,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:17,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:17,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2020-10-26 19:27:17,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261961851] [2020-10-26 19:27:17,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:17,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:17,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142454906] [2020-10-26 19:27:17,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:17,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:17,541 INFO L87 Difference]: Start difference. First operand 178 states and 186 transitions. Second operand 22 states. [2020-10-26 19:27:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:18,131 INFO L93 Difference]: Finished difference Result 339 states and 362 transitions. [2020-10-26 19:27:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:18,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 173 [2020-10-26 19:27:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:18,134 INFO L225 Difference]: With dead ends: 339 [2020-10-26 19:27:18,134 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:27:18,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:27:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:27:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:27:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2020-10-26 19:27:18,145 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 173 [2020-10-26 19:27:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:18,145 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2020-10-26 19:27:18,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2020-10-26 19:27:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:27:18,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:18,147 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:18,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:18,147 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash 370486454, now seen corresponding path program 19 times [2020-10-26 19:27:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:18,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245240337] [2020-10-26 19:27:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:18,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:23,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:23,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:23,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2020-10-26 19:27:23,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245240337] [2020-10-26 19:27:23,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:23,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:23,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095301939] [2020-10-26 19:27:23,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:23,639 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand 23 states. [2020-10-26 19:27:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:24,265 INFO L93 Difference]: Finished difference Result 354 states and 377 transitions. [2020-10-26 19:27:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:24,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 181 [2020-10-26 19:27:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:24,267 INFO L225 Difference]: With dead ends: 354 [2020-10-26 19:27:24,267 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:27:24,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:27:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-26 19:27:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-26 19:27:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 202 transitions. [2020-10-26 19:27:24,279 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 202 transitions. Word has length 181 [2020-10-26 19:27:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:24,279 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 202 transitions. [2020-10-26 19:27:24,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 202 transitions. [2020-10-26 19:27:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 19:27:24,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:24,281 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:24,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:24,281 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1906013370, now seen corresponding path program 20 times [2020-10-26 19:27:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:24,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884867526] [2020-10-26 19:27:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:24,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:29,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:29,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:29,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:29,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:29,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:29,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:29,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-26 19:27:29,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884867526] [2020-10-26 19:27:29,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:29,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226111515] [2020-10-26 19:27:29,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:29,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:29,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:29,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:29,796 INFO L87 Difference]: Start difference. First operand 194 states and 202 transitions. Second operand 24 states. [2020-10-26 19:27:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:30,352 INFO L93 Difference]: Finished difference Result 369 states and 392 transitions. [2020-10-26 19:27:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:30,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2020-10-26 19:27:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:30,355 INFO L225 Difference]: With dead ends: 369 [2020-10-26 19:27:30,355 INFO L226 Difference]: Without dead ends: 202 [2020-10-26 19:27:30,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-26 19:27:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-26 19:27:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:27:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2020-10-26 19:27:30,366 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 189 [2020-10-26 19:27:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:30,366 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2020-10-26 19:27:30,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2020-10-26 19:27:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:27:30,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:30,368 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:30,368 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 346145078, now seen corresponding path program 21 times [2020-10-26 19:27:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:30,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117551280] [2020-10-26 19:27:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:30,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:35,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:35,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:27:35,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117551280] [2020-10-26 19:27:35,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:35,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:35,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368227926] [2020-10-26 19:27:35,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:35,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:35,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:35,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:35,930 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand 25 states. [2020-10-26 19:27:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:36,509 INFO L93 Difference]: Finished difference Result 384 states and 407 transitions. [2020-10-26 19:27:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:36,513 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 197 [2020-10-26 19:27:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:36,514 INFO L225 Difference]: With dead ends: 384 [2020-10-26 19:27:36,514 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:27:36,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:27:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-26 19:27:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-26 19:27:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 218 transitions. [2020-10-26 19:27:36,525 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 218 transitions. Word has length 197 [2020-10-26 19:27:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:36,525 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 218 transitions. [2020-10-26 19:27:36,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 218 transitions. [2020-10-26 19:27:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 19:27:36,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:36,526 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:36,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:36,527 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash -149883590, now seen corresponding path program 22 times [2020-10-26 19:27:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:36,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351943169] [2020-10-26 19:27:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:41,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 19:27:41,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:41,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:42,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2020-10-26 19:27:42,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351943169] [2020-10-26 19:27:42,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:42,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:42,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638599609] [2020-10-26 19:27:42,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:42,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:42,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:42,113 INFO L87 Difference]: Start difference. First operand 210 states and 218 transitions. Second operand 26 states. [2020-10-26 19:27:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:42,791 INFO L93 Difference]: Finished difference Result 399 states and 422 transitions. [2020-10-26 19:27:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:42,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 205 [2020-10-26 19:27:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:42,792 INFO L225 Difference]: With dead ends: 399 [2020-10-26 19:27:42,792 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:27:42,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:27:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-26 19:27:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 19:27:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 226 transitions. [2020-10-26 19:27:42,804 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 226 transitions. Word has length 205 [2020-10-26 19:27:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:42,804 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 226 transitions. [2020-10-26 19:27:42,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 226 transitions. [2020-10-26 19:27:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-26 19:27:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:42,806 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:42,806 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash -8948298, now seen corresponding path program 23 times [2020-10-26 19:27:42,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:42,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767412241] [2020-10-26 19:27:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:48,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:48,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:48,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:48,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-26 19:27:48,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767412241] [2020-10-26 19:27:48,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:48,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241850133] [2020-10-26 19:27:48,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:48,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:48,650 INFO L87 Difference]: Start difference. First operand 218 states and 226 transitions. Second operand 27 states. [2020-10-26 19:27:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:49,360 INFO L93 Difference]: Finished difference Result 414 states and 437 transitions. [2020-10-26 19:27:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:49,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 213 [2020-10-26 19:27:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:49,363 INFO L225 Difference]: With dead ends: 414 [2020-10-26 19:27:49,363 INFO L226 Difference]: Without dead ends: 226 [2020-10-26 19:27:49,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-26 19:27:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-26 19:27:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-26 19:27:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 234 transitions. [2020-10-26 19:27:49,375 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 234 transitions. Word has length 213 [2020-10-26 19:27:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:49,375 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 234 transitions. [2020-10-26 19:27:49,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 234 transitions. [2020-10-26 19:27:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 19:27:49,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:49,377 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:49,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:49,379 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1062786490, now seen corresponding path program 24 times [2020-10-26 19:27:49,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:49,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214987133] [2020-10-26 19:27:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:55,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:55,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2020-10-26 19:27:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214987133] [2020-10-26 19:27:55,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697216394] [2020-10-26 19:27:55,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:55,215 INFO L87 Difference]: Start difference. First operand 226 states and 234 transitions. Second operand 28 states. [2020-10-26 19:27:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:55,986 INFO L93 Difference]: Finished difference Result 429 states and 452 transitions. [2020-10-26 19:27:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:55,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 221 [2020-10-26 19:27:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:55,988 INFO L225 Difference]: With dead ends: 429 [2020-10-26 19:27:55,988 INFO L226 Difference]: Without dead ends: 234 [2020-10-26 19:27:55,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-26 19:27:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-26 19:27:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-26 19:27:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 242 transitions. [2020-10-26 19:27:56,000 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 242 transitions. Word has length 221 [2020-10-26 19:27:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:56,002 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 242 transitions. [2020-10-26 19:27:56,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 242 transitions. [2020-10-26 19:27:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 19:27:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:56,004 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:56,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:56,005 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1271510474, now seen corresponding path program 25 times [2020-10-26 19:27:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:56,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538755313] [2020-10-26 19:27:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:01,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-26 19:28:01,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:28:01,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:28:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:28:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:01,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:01,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:01,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2020-10-26 19:28:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538755313] [2020-10-26 19:28:01,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:01,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:28:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964847347] [2020-10-26 19:28:01,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:28:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:28:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:01,799 INFO L87 Difference]: Start difference. First operand 234 states and 242 transitions. Second operand 29 states. [2020-10-26 19:28:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:02,450 INFO L93 Difference]: Finished difference Result 444 states and 467 transitions. [2020-10-26 19:28:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:28:02,450 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 229 [2020-10-26 19:28:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:02,452 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:28:02,452 INFO L226 Difference]: Without dead ends: 242 [2020-10-26 19:28:02,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:28:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-26 19:28:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-26 19:28:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-26 19:28:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 250 transitions. [2020-10-26 19:28:02,464 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 250 transitions. Word has length 229 [2020-10-26 19:28:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:02,464 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 250 transitions. [2020-10-26 19:28:02,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:28:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 250 transitions. [2020-10-26 19:28:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 19:28:02,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:02,467 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:02,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:28:02,467 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash 961746490, now seen corresponding path program 26 times [2020-10-26 19:28:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:02,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431459188] [2020-10-26 19:28:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:02,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:28:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:08,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:08,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2020-10-26 19:28:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431459188] [2020-10-26 19:28:08,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:08,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:28:08,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736173578] [2020-10-26 19:28:08,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:28:08,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:08,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:28:08,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:08,265 INFO L87 Difference]: Start difference. First operand 242 states and 250 transitions. Second operand 30 states. [2020-10-26 19:28:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:08,932 INFO L93 Difference]: Finished difference Result 459 states and 482 transitions. [2020-10-26 19:28:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:28:08,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 237 [2020-10-26 19:28:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:08,934 INFO L225 Difference]: With dead ends: 459 [2020-10-26 19:28:08,934 INFO L226 Difference]: Without dead ends: 250 [2020-10-26 19:28:08,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-26 19:28:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-26 19:28:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:28:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 258 transitions. [2020-10-26 19:28:08,948 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 258 transitions. Word has length 237 [2020-10-26 19:28:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:08,948 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 258 transitions. [2020-10-26 19:28:08,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:28:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 258 transitions. [2020-10-26 19:28:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 19:28:08,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:08,951 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:08,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:28:08,951 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1367458122, now seen corresponding path program 27 times [2020-10-26 19:28:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:08,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384893000] [2020-10-26 19:28:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:28:14,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:14,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:28:14,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:14,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:14,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:14,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:14,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-26 19:28:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384893000] [2020-10-26 19:28:14,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:14,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:28:14,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361696611] [2020-10-26 19:28:14,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:28:14,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:28:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:14,840 INFO L87 Difference]: Start difference. First operand 250 states and 258 transitions. Second operand 31 states. [2020-10-26 19:28:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:15,512 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2020-10-26 19:28:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:28:15,512 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 245 [2020-10-26 19:28:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:15,514 INFO L225 Difference]: With dead ends: 474 [2020-10-26 19:28:15,514 INFO L226 Difference]: Without dead ends: 258 [2020-10-26 19:28:15,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-26 19:28:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-26 19:28:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-26 19:28:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 266 transitions. [2020-10-26 19:28:15,527 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 266 transitions. Word has length 245 [2020-10-26 19:28:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:15,527 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 266 transitions. [2020-10-26 19:28:15,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:28:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 266 transitions. [2020-10-26 19:28:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 19:28:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:15,530 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:28:15,530 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1440724666, now seen corresponding path program 28 times [2020-10-26 19:28:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88619326] [2020-10-26 19:28:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:20,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:21,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2020-10-26 19:28:21,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88619326] [2020-10-26 19:28:21,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:21,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3661090] [2020-10-26 19:28:21,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:21,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:21,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:21,388 INFO L87 Difference]: Start difference. First operand 258 states and 266 transitions. Second operand 32 states. [2020-10-26 19:28:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:22,209 INFO L93 Difference]: Finished difference Result 489 states and 512 transitions. [2020-10-26 19:28:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:22,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 253 [2020-10-26 19:28:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:22,212 INFO L225 Difference]: With dead ends: 489 [2020-10-26 19:28:22,212 INFO L226 Difference]: Without dead ends: 266 [2020-10-26 19:28:22,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-26 19:28:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2020-10-26 19:28:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-26 19:28:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2020-10-26 19:28:22,225 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 253 [2020-10-26 19:28:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:22,225 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2020-10-26 19:28:22,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2020-10-26 19:28:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 19:28:22,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:22,227 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:22,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:22,227 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 133124918, now seen corresponding path program 29 times [2020-10-26 19:28:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:22,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017363204] [2020-10-26 19:28:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:22,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:27,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:28,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:28,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:28,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:28,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:28,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-26 19:28:28,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017363204] [2020-10-26 19:28:28,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:28,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913136389] [2020-10-26 19:28:28,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:28,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:28,151 INFO L87 Difference]: Start difference. First operand 266 states and 274 transitions. Second operand 33 states. [2020-10-26 19:28:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:28,921 INFO L93 Difference]: Finished difference Result 504 states and 527 transitions. [2020-10-26 19:28:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:28,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 261 [2020-10-26 19:28:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:28,924 INFO L225 Difference]: With dead ends: 504 [2020-10-26 19:28:28,925 INFO L226 Difference]: Without dead ends: 274 [2020-10-26 19:28:28,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-26 19:28:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-26 19:28:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-26 19:28:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 282 transitions. [2020-10-26 19:28:28,937 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 282 transitions. Word has length 261 [2020-10-26 19:28:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:28,937 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 282 transitions. [2020-10-26 19:28:28,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 282 transitions. [2020-10-26 19:28:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-26 19:28:28,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:28,939 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:28,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:28,939 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2015447238, now seen corresponding path program 30 times [2020-10-26 19:28:28,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:28,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161708221] [2020-10-26 19:28:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:34,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:34,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:34,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3720 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2020-10-26 19:28:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161708221] [2020-10-26 19:28:34,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:34,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:34,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271754969] [2020-10-26 19:28:34,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:34,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:34,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:34,954 INFO L87 Difference]: Start difference. First operand 274 states and 282 transitions. Second operand 34 states. [2020-10-26 19:28:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:35,801 INFO L93 Difference]: Finished difference Result 519 states and 542 transitions. [2020-10-26 19:28:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:35,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 269 [2020-10-26 19:28:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:35,804 INFO L225 Difference]: With dead ends: 519 [2020-10-26 19:28:35,804 INFO L226 Difference]: Without dead ends: 282 [2020-10-26 19:28:35,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-26 19:28:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-26 19:28:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-26 19:28:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 290 transitions. [2020-10-26 19:28:35,816 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 290 transitions. Word has length 269 [2020-10-26 19:28:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:35,816 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 290 transitions. [2020-10-26 19:28:35,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 290 transitions. [2020-10-26 19:28:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 19:28:35,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:35,818 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:35,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:35,818 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:35,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2015987638, now seen corresponding path program 31 times [2020-10-26 19:28:35,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:35,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995354871] [2020-10-26 19:28:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:35,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:40,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:41,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:41,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:41,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2020-10-26 19:28:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995354871] [2020-10-26 19:28:41,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:41,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:41,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945517152] [2020-10-26 19:28:41,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:41,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:41,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:41,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:41,821 INFO L87 Difference]: Start difference. First operand 282 states and 290 transitions. Second operand 35 states. [2020-10-26 19:28:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:42,643 INFO L93 Difference]: Finished difference Result 534 states and 557 transitions. [2020-10-26 19:28:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:42,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 277 [2020-10-26 19:28:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:42,646 INFO L225 Difference]: With dead ends: 534 [2020-10-26 19:28:42,646 INFO L226 Difference]: Without dead ends: 290 [2020-10-26 19:28:42,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-26 19:28:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2020-10-26 19:28:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-26 19:28:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 298 transitions. [2020-10-26 19:28:42,657 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 298 transitions. Word has length 277 [2020-10-26 19:28:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:42,657 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 298 transitions. [2020-10-26 19:28:42,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 298 transitions. [2020-10-26 19:28:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 19:28:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:42,660 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:42,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:42,660 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1144002490, now seen corresponding path program 32 times [2020-10-26 19:28:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374957273] [2020-10-26 19:28:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:48,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:48,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:48,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:48,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:48,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:48,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:48,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:48,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:48,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:48,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:48,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2020-10-26 19:28:48,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374957273] [2020-10-26 19:28:48,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:48,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6012377] [2020-10-26 19:28:48,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:48,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:48,799 INFO L87 Difference]: Start difference. First operand 290 states and 298 transitions. Second operand 36 states. [2020-10-26 19:28:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:49,763 INFO L93 Difference]: Finished difference Result 549 states and 572 transitions. [2020-10-26 19:28:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:49,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 285 [2020-10-26 19:28:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:49,765 INFO L225 Difference]: With dead ends: 549 [2020-10-26 19:28:49,766 INFO L226 Difference]: Without dead ends: 298 [2020-10-26 19:28:49,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-26 19:28:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-26 19:28:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-26 19:28:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 306 transitions. [2020-10-26 19:28:49,777 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 306 transitions. Word has length 285 [2020-10-26 19:28:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:49,777 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 306 transitions. [2020-10-26 19:28:49,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 306 transitions. [2020-10-26 19:28:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-26 19:28:49,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:49,779 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:49,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:49,780 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1422711862, now seen corresponding path program 33 times [2020-10-26 19:28:49,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:49,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151676582] [2020-10-26 19:28:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:49,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:55,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:55,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:55,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:55,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:55,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4488 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-10-26 19:28:55,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151676582] [2020-10-26 19:28:55,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:55,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682829603] [2020-10-26 19:28:55,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:55,927 INFO L87 Difference]: Start difference. First operand 298 states and 306 transitions. Second operand 37 states. [2020-10-26 19:28:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:56,753 INFO L93 Difference]: Finished difference Result 564 states and 587 transitions. [2020-10-26 19:28:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:56,754 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 293 [2020-10-26 19:28:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:56,756 INFO L225 Difference]: With dead ends: 564 [2020-10-26 19:28:56,756 INFO L226 Difference]: Without dead ends: 306 [2020-10-26 19:28:56,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-26 19:28:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2020-10-26 19:28:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-26 19:28:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 314 transitions. [2020-10-26 19:28:56,768 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 314 transitions. Word has length 293 [2020-10-26 19:28:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:56,768 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 314 transitions. [2020-10-26 19:28:56,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 314 transitions. [2020-10-26 19:28:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-26 19:28:56,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:56,770 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:56,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:56,770 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2118920134, now seen corresponding path program 34 times [2020-10-26 19:28:56,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:56,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481946331] [2020-10-26 19:28:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:57,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:57,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:01,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 19:29:01,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:29:01,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:02,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:02,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:02,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:02,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:02,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:02,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:02,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4165 trivial. 0 not checked. [2020-10-26 19:29:02,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481946331] [2020-10-26 19:29:02,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:02,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:29:02,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818350318] [2020-10-26 19:29:02,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:29:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:29:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:02,920 INFO L87 Difference]: Start difference. First operand 306 states and 314 transitions. Second operand 38 states. [2020-10-26 19:29:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:03,798 INFO L93 Difference]: Finished difference Result 579 states and 602 transitions. [2020-10-26 19:29:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:29:03,799 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 301 [2020-10-26 19:29:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:03,801 INFO L225 Difference]: With dead ends: 579 [2020-10-26 19:29:03,801 INFO L226 Difference]: Without dead ends: 314 [2020-10-26 19:29:03,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:29:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-26 19:29:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2020-10-26 19:29:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-26 19:29:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 322 transitions. [2020-10-26 19:29:03,812 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 322 transitions. Word has length 301 [2020-10-26 19:29:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:03,812 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 322 transitions. [2020-10-26 19:29:03,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:29:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 322 transitions. [2020-10-26 19:29:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 19:29:03,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:03,815 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:03,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:29:03,815 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1854320458, now seen corresponding path program 35 times [2020-10-26 19:29:03,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:03,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987735235] [2020-10-26 19:29:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:29:09,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:10,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:10,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:10,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2020-10-26 19:29:10,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987735235] [2020-10-26 19:29:10,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:10,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:29:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777929566] [2020-10-26 19:29:10,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:29:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:29:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:10,059 INFO L87 Difference]: Start difference. First operand 314 states and 322 transitions. Second operand 39 states. [2020-10-26 19:29:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:11,123 INFO L93 Difference]: Finished difference Result 594 states and 617 transitions. [2020-10-26 19:29:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:29:11,123 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 309 [2020-10-26 19:29:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:11,125 INFO L225 Difference]: With dead ends: 594 [2020-10-26 19:29:11,125 INFO L226 Difference]: Without dead ends: 322 [2020-10-26 19:29:11,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-26 19:29:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-26 19:29:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-26 19:29:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 330 transitions. [2020-10-26 19:29:11,136 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 330 transitions. Word has length 309 [2020-10-26 19:29:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 330 transitions. [2020-10-26 19:29:11,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:29:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 330 transitions. [2020-10-26 19:29:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-26 19:29:11,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:11,139 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:11,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:29:11,139 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1186334534, now seen corresponding path program 36 times [2020-10-26 19:29:11,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:11,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097282232] [2020-10-26 19:29:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:16,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:16,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-26 19:29:16,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 19:29:16,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:29:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:29:16,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:17,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2020-10-26 19:29:17,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097282232] [2020-10-26 19:29:17,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:17,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:29:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701392655] [2020-10-26 19:29:17,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:29:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:29:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:17,435 INFO L87 Difference]: Start difference. First operand 322 states and 330 transitions. Second operand 40 states. [2020-10-26 19:29:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:18,540 INFO L93 Difference]: Finished difference Result 609 states and 632 transitions. [2020-10-26 19:29:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:29:18,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-10-26 19:29:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:18,543 INFO L225 Difference]: With dead ends: 609 [2020-10-26 19:29:18,543 INFO L226 Difference]: Without dead ends: 330 [2020-10-26 19:29:18,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-26 19:29:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2020-10-26 19:29:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-26 19:29:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 338 transitions. [2020-10-26 19:29:18,554 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 338 transitions. Word has length 317 [2020-10-26 19:29:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:18,555 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 338 transitions. [2020-10-26 19:29:18,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:29:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 338 transitions. [2020-10-26 19:29:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-26 19:29:18,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:18,557 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:18,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:29:18,557 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1076959946, now seen corresponding path program 37 times [2020-10-26 19:29:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:18,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639173489] [2020-10-26 19:29:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:18,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking...