/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/eca-rers2012/Problem15_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:36:55,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:36:55,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:36:55,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:36:55,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:36:55,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:36:55,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:36:55,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:36:55,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:36:55,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:36:55,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:36:55,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:36:55,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:36:55,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:36:55,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:36:55,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:36:55,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:36:55,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:36:56,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:36:56,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:36:56,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:36:56,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:36:56,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:36:56,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:36:56,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:36:56,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:36:56,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:36:56,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:36:56,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:36:56,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:36:56,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:36:56,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:36:56,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:36:56,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:36:56,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:36:56,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:36:56,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:36:56,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:36:56,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:36:56,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:36:56,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:36:56,083 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 23:36:56,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:36:56,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:36:56,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:36:56,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:36:56,160 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:36:56,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:36:56,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:36:56,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:36:56,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:36:56,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:36:56,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:36:56,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:36:56,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:36:56,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:36:56,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:36:56,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:36:56,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:36:56,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:36:56,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:36:56,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:36:56,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:36:56,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:36:56,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:36:56,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:36:56,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:36:56,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:36:56,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:36:56,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:36:56,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:36:56,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:36:56,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:36:56,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:36:56,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:36:56,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:36:56,750 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:36:56,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2020-10-26 23:36:56,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2eefc5/b064c6e5524e45819fa701b017c61f7b/FLAG943a67b75 [2020-10-26 23:36:57,962 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:36:57,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2020-10-26 23:36:57,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2eefc5/b064c6e5524e45819fa701b017c61f7b/FLAG943a67b75 [2020-10-26 23:36:58,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2eefc5/b064c6e5524e45819fa701b017c61f7b [2020-10-26 23:36:58,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:36:58,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:36:58,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:36:58,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:36:58,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:36:58,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:58" (1/1) ... [2020-10-26 23:36:58,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a329452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:58, skipping insertion in model container [2020-10-26 23:36:58,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:58" (1/1) ... [2020-10-26 23:36:58,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:36:58,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:36:59,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:36:59,652 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:37:00,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:37:00,037 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:37:00,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00 WrapperNode [2020-10-26 23:37:00,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:37:00,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:37:00,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:37:00,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:37:00,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... [2020-10-26 23:37:00,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:37:00,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:37:00,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:37:00,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:37:00,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:37:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:37:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:37:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:37:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:37:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:37:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:37:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:37:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:37:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:37:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:37:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:37:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:37:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:37:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:37:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:37:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:37:04,067 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:37:04,068 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:37:04,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:37:04 BoogieIcfgContainer [2020-10-26 23:37:04,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:37:04,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:37:04,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:37:04,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:37:04,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:36:58" (1/3) ... [2020-10-26 23:37:04,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0ce823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:37:04, skipping insertion in model container [2020-10-26 23:37:04,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:37:00" (2/3) ... [2020-10-26 23:37:04,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0ce823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:37:04, skipping insertion in model container [2020-10-26 23:37:04,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:37:04" (3/3) ... [2020-10-26 23:37:04,081 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2020-10-26 23:37:04,094 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:37:04,101 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:37:04,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:37:04,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:37:04,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:37:04,150 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:37:04,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:37:04,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:37:04,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:37:04,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:37:04,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:37:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:37:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 23:37:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:04,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:04,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1602309305, now seen corresponding path program 1 times [2020-10-26 23:37:04,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:04,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277041217] [2020-10-26 23:37:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:05,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:37:05,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-26 23:37:05,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 23:37:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:37:05,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:05,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:05,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:05,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:37:05,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:05,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:05,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:05,403 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 23:37:05,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277041217] [2020-10-26 23:37:05,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:05,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:37:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445009399] [2020-10-26 23:37:05,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:37:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:05,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:37:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:37:05,432 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 5 states. [2020-10-26 23:37:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:17,609 INFO L93 Difference]: Finished difference Result 1530 states and 2802 transitions. [2020-10-26 23:37:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:37:17,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-26 23:37:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:17,647 INFO L225 Difference]: With dead ends: 1530 [2020-10-26 23:37:17,649 INFO L226 Difference]: Without dead ends: 1021 [2020-10-26 23:37:17,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-10-26 23:37:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1015. [2020-10-26 23:37:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 23:37:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1537 transitions. [2020-10-26 23:37:17,822 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1537 transitions. Word has length 66 [2020-10-26 23:37:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1537 transitions. [2020-10-26 23:37:17,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:37:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1537 transitions. [2020-10-26 23:37:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 23:37:17,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:17,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:17,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:37:17,837 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 150182447, now seen corresponding path program 1 times [2020-10-26 23:37:17,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:17,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620337493] [2020-10-26 23:37:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:18,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:18,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 23:37:20,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:37:20,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-26 23:37:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 23:37:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:37:20,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:20,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:20,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 23:37:20,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:20,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:20,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:37:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:20,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:20,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 23:37:20,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:20,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-26 23:37:20,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:20,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:20,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:20,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 23:37:20,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 23:37:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:37:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620337493] [2020-10-26 23:37:21,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:37:21,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:37:21,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127260969] [2020-10-26 23:37:21,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:21,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:21,022 INFO L87 Difference]: Start difference. First operand 1015 states and 1537 transitions. Second operand 7 states. [2020-10-26 23:37:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:32,527 INFO L93 Difference]: Finished difference Result 3004 states and 4616 transitions. [2020-10-26 23:37:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:37:32,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-10-26 23:37:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:32,546 INFO L225 Difference]: With dead ends: 3004 [2020-10-26 23:37:32,546 INFO L226 Difference]: Without dead ends: 1995 [2020-10-26 23:37:32,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:37:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2020-10-26 23:37:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1961. [2020-10-26 23:37:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-10-26 23:37:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2619 transitions. [2020-10-26 23:37:32,642 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2619 transitions. Word has length 182 [2020-10-26 23:37:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:32,643 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 2619 transitions. [2020-10-26 23:37:32,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2619 transitions. [2020-10-26 23:37:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-26 23:37:32,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:32,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:32,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:37:32,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 99505864, now seen corresponding path program 1 times [2020-10-26 23:37:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456310378] [2020-10-26 23:37:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:33,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:33,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:37,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:37,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-26 23:37:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:37,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:38,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:38,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:38,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:37:38,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:38,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:38,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:37:38,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:38,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 23:37:38,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:38,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:38,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:37:38,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:37:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:38,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:38,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:37:38,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:37:38,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-26 23:37:38,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:38,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:38,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:38,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 23:37:38,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 23:37:39,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456310378] [2020-10-26 23:37:39,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:39,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:37:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852450937] [2020-10-26 23:37:39,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:39,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:39,337 INFO L87 Difference]: Start difference. First operand 1961 states and 2619 transitions. Second operand 7 states. [2020-10-26 23:37:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:37:47,252 INFO L93 Difference]: Finished difference Result 5528 states and 7570 transitions. [2020-10-26 23:37:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:37:47,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 318 [2020-10-26 23:37:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:37:47,277 INFO L225 Difference]: With dead ends: 5528 [2020-10-26 23:37:47,277 INFO L226 Difference]: Without dead ends: 3573 [2020-10-26 23:37:47,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:37:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2020-10-26 23:37:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3529. [2020-10-26 23:37:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3529 states. [2020-10-26 23:37:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 4447 transitions. [2020-10-26 23:37:47,403 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 4447 transitions. Word has length 318 [2020-10-26 23:37:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:37:47,404 INFO L481 AbstractCegarLoop]: Abstraction has 3529 states and 4447 transitions. [2020-10-26 23:37:47,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:37:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 4447 transitions. [2020-10-26 23:37:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-10-26 23:37:47,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:37:47,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:47,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:37:47,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:37:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:37:47,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1137157772, now seen corresponding path program 1 times [2020-10-26 23:37:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:37:47,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691157208] [2020-10-26 23:37:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:37:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:47,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:52,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:52,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-26 23:37:52,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:37:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 23:37:52,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:37:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:37:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:37:52,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:52,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:37:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:52,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:52,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:37:52,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:52,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:37:52,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:37:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:37:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:52,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:37:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:52,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:37:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-26 23:37:53,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:37:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:37:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:37:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:53,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:37:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:37:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:37:53,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:37:53,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:37:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:37:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:37:54,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691157208] [2020-10-26 23:37:54,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:37:54,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:37:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262948755] [2020-10-26 23:37:54,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:37:54,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:37:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:37:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:37:54,343 INFO L87 Difference]: Start difference. First operand 3529 states and 4447 transitions. Second operand 7 states. [2020-10-26 23:38:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:02,748 INFO L93 Difference]: Finished difference Result 7408 states and 9302 transitions. [2020-10-26 23:38:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:38:02,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 346 [2020-10-26 23:38:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:02,776 INFO L225 Difference]: With dead ends: 7408 [2020-10-26 23:38:02,777 INFO L226 Difference]: Without dead ends: 3885 [2020-10-26 23:38:02,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:38:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-10-26 23:38:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3862. [2020-10-26 23:38:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3862 states. [2020-10-26 23:38:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3862 states to 3862 states and 4805 transitions. [2020-10-26 23:38:02,940 INFO L78 Accepts]: Start accepts. Automaton has 3862 states and 4805 transitions. Word has length 346 [2020-10-26 23:38:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:02,941 INFO L481 AbstractCegarLoop]: Abstraction has 3862 states and 4805 transitions. [2020-10-26 23:38:02,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:38:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3862 states and 4805 transitions. [2020-10-26 23:38:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-26 23:38:02,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:02,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:02,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:38:02,952 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1479142837, now seen corresponding path program 1 times [2020-10-26 23:38:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:02,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201393882] [2020-10-26 23:38:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:03,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:03,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:06,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-26 23:38:06,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3588 [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:38:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:06,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:06,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:06,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:06,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:38:06,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:06,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 23:38:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:07,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:07,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:38:07,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:07,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-26 23:38:07,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:38:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:07,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:38:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:07,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:07,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:38:07,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:07,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 23:38:07,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:38:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:38:08,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201393882] [2020-10-26 23:38:08,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:08,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:38:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712383981] [2020-10-26 23:38:08,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:38:08,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:38:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:38:08,027 INFO L87 Difference]: Start difference. First operand 3862 states and 4805 transitions. Second operand 7 states. [2020-10-26 23:38:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:18,668 INFO L93 Difference]: Finished difference Result 8766 states and 11183 transitions. [2020-10-26 23:38:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:38:18,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 420 [2020-10-26 23:38:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:18,706 INFO L225 Difference]: With dead ends: 8766 [2020-10-26 23:38:18,707 INFO L226 Difference]: Without dead ends: 5217 [2020-10-26 23:38:18,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:38:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2020-10-26 23:38:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5168. [2020-10-26 23:38:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5168 states. [2020-10-26 23:38:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 6291 transitions. [2020-10-26 23:38:18,895 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 6291 transitions. Word has length 420 [2020-10-26 23:38:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:18,896 INFO L481 AbstractCegarLoop]: Abstraction has 5168 states and 6291 transitions. [2020-10-26 23:38:18,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:38:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 6291 transitions. [2020-10-26 23:38:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-10-26 23:38:18,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:18,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:18,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:38:18,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1900253273, now seen corresponding path program 1 times [2020-10-26 23:38:18,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:18,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593344121] [2020-10-26 23:38:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:19,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:19,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:21,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:24,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:24,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-10-26 23:38:24,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:38:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 23:38:24,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:38:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:38:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-10-26 23:38:24,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:24,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:24,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:24,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:24,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:38:24,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:24,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:24,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:38:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:38:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:38:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:25,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:25,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:38:25,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:25,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-26 23:38:25,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:38:25,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:25,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:38:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:38:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 416 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 23:38:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593344121] [2020-10-26 23:38:25,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:25,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:38:25,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490770895] [2020-10-26 23:38:25,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:38:25,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:25,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:38:25,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:38:25,864 INFO L87 Difference]: Start difference. First operand 5168 states and 6291 transitions. Second operand 8 states. [2020-10-26 23:38:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:41,340 INFO L93 Difference]: Finished difference Result 13581 states and 17370 transitions. [2020-10-26 23:38:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:38:41,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 441 [2020-10-26 23:38:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:41,384 INFO L225 Difference]: With dead ends: 13581 [2020-10-26 23:38:41,384 INFO L226 Difference]: Without dead ends: 7758 [2020-10-26 23:38:41,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:38:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7758 states. [2020-10-26 23:38:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7758 to 6773. [2020-10-26 23:38:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-10-26 23:38:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 7858 transitions. [2020-10-26 23:38:41,621 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 7858 transitions. Word has length 441 [2020-10-26 23:38:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:41,621 INFO L481 AbstractCegarLoop]: Abstraction has 6773 states and 7858 transitions. [2020-10-26 23:38:41,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:38:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 7858 transitions. [2020-10-26 23:38:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-10-26 23:38:41,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:41,637 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:41,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:38:41,637 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash 828785565, now seen corresponding path program 1 times [2020-10-26 23:38:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070565819] [2020-10-26 23:38:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:41,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:46,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:46,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 547 [2020-10-26 23:38:46,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:38:46,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:47,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:47,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:47,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:47,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:47,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:38:47,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:38:47,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:47,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:47,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:38:47,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-26 23:38:47,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:38:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:38:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:38:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:47,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:47,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:38:47,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:38:47,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:48,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2020-10-26 23:38:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:48,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:48,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 23:38:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 23:38:48,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070565819] [2020-10-26 23:38:48,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:38:48,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:38:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025898275] [2020-10-26 23:38:48,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:38:48,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:38:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:38:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:38:48,522 INFO L87 Difference]: Start difference. First operand 6773 states and 7858 transitions. Second operand 7 states. [2020-10-26 23:38:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:38:56,137 INFO L93 Difference]: Finished difference Result 15487 states and 17977 transitions. [2020-10-26 23:38:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:38:56,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 531 [2020-10-26 23:38:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:38:56,177 INFO L225 Difference]: With dead ends: 15487 [2020-10-26 23:38:56,178 INFO L226 Difference]: Without dead ends: 9027 [2020-10-26 23:38:56,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:38:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9027 states. [2020-10-26 23:38:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9027 to 8669. [2020-10-26 23:38:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8669 states. [2020-10-26 23:38:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8669 states to 8669 states and 9903 transitions. [2020-10-26 23:38:56,413 INFO L78 Accepts]: Start accepts. Automaton has 8669 states and 9903 transitions. Word has length 531 [2020-10-26 23:38:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:38:56,414 INFO L481 AbstractCegarLoop]: Abstraction has 8669 states and 9903 transitions. [2020-10-26 23:38:56,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:38:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8669 states and 9903 transitions. [2020-10-26 23:38:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2020-10-26 23:38:56,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:38:56,433 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:56,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:38:56,434 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:38:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:38:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash 571921173, now seen corresponding path program 1 times [2020-10-26 23:38:56,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:38:56,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608454711] [2020-10-26 23:38:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:38:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 559 [2020-10-26 23:38:59,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:38:59,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2542 [2020-10-26 23:38:59,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:38:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:38:59,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:38:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:38:59,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:38:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:38:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:59,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:38:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:38:59,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:38:59,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:38:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:38:59,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:38:59,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:38:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:38:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:38:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:39:00,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608454711] [2020-10-26 23:39:00,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:00,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:39:00,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718962020] [2020-10-26 23:39:00,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:39:00,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:39:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:39:00,037 INFO L87 Difference]: Start difference. First operand 8669 states and 9903 transitions. Second operand 7 states. [2020-10-26 23:39:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:11,386 INFO L93 Difference]: Finished difference Result 22420 states and 25998 transitions. [2020-10-26 23:39:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:39:11,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 543 [2020-10-26 23:39:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:11,440 INFO L225 Difference]: With dead ends: 22420 [2020-10-26 23:39:11,441 INFO L226 Difference]: Without dead ends: 14064 [2020-10-26 23:39:11,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:39:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2020-10-26 23:39:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 11276. [2020-10-26 23:39:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11276 states. [2020-10-26 23:39:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 13179 transitions. [2020-10-26 23:39:11,772 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 13179 transitions. Word has length 543 [2020-10-26 23:39:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:11,773 INFO L481 AbstractCegarLoop]: Abstraction has 11276 states and 13179 transitions. [2020-10-26 23:39:11,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:39:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 13179 transitions. [2020-10-26 23:39:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-10-26 23:39:11,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:11,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:11,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:39:11,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:11,788 INFO L82 PathProgramCache]: Analyzing trace with hash 237856335, now seen corresponding path program 1 times [2020-10-26 23:39:11,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:11,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059057113] [2020-10-26 23:39:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:12,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:16,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 578 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-26 23:39:16,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:17,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:39:17,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:39:17,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 23:39:17,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:39:17,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:39:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:17,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:39:17,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:39:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:17,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:18,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:18,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 23:39:18,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-26 23:39:18,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:39:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 23:39:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 353 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:39:18,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059057113] [2020-10-26 23:39:18,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:18,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:39:18,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707033907] [2020-10-26 23:39:18,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:39:18,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:39:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:39:18,701 INFO L87 Difference]: Start difference. First operand 11276 states and 13179 transitions. Second operand 11 states. [2020-10-26 23:39:23,106 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 23:39:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:39:38,279 INFO L93 Difference]: Finished difference Result 23868 states and 28331 transitions. [2020-10-26 23:39:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 23:39:38,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 562 [2020-10-26 23:39:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:39:38,411 INFO L225 Difference]: With dead ends: 23868 [2020-10-26 23:39:38,412 INFO L226 Difference]: Without dead ends: 12287 [2020-10-26 23:39:38,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-26 23:39:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12287 states. [2020-10-26 23:39:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12287 to 12233. [2020-10-26 23:39:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12233 states. [2020-10-26 23:39:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12233 states to 12233 states and 14219 transitions. [2020-10-26 23:39:38,756 INFO L78 Accepts]: Start accepts. Automaton has 12233 states and 14219 transitions. Word has length 562 [2020-10-26 23:39:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:39:38,757 INFO L481 AbstractCegarLoop]: Abstraction has 12233 states and 14219 transitions. [2020-10-26 23:39:38,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 23:39:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12233 states and 14219 transitions. [2020-10-26 23:39:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2020-10-26 23:39:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:39:38,770 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:39:38,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:39:38,771 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:39:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:39:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1595617562, now seen corresponding path program 1 times [2020-10-26 23:39:38,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:39:38,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248711668] [2020-10-26 23:39:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:39:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:42,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:43,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:43,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 599 [2020-10-26 23:39:43,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:39:43,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 23:39:43,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 23:39:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:39:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-26 23:39:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:39:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:44,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:39:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:39:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:39:44,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:44,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:39:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:39:44,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:44,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 23:39:44,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-26 23:39:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:45,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:45,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:45,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:45,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:39:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:39:45,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:46,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 445 [2020-10-26 23:39:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:39:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:39:46,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:39:46,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:39:46,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:39:46,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 23:39:46,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:39:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:39:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 23:39:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:39:46,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:39:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 209 proven. 318 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 23:39:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248711668] [2020-10-26 23:39:47,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:39:47,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:39:47,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452833099] [2020-10-26 23:39:47,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 23:39:47,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:39:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 23:39:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:39:47,395 INFO L87 Difference]: Start difference. First operand 12233 states and 14219 transitions. Second operand 10 states. [2020-10-26 23:39:47,644 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-26 23:39:49,473 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 23:39:49,732 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 23:39:50,896 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 23:39:54,768 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-26 23:40:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:01,426 INFO L93 Difference]: Finished difference Result 24252 states and 28278 transitions. [2020-10-26 23:40:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:40:01,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 583 [2020-10-26 23:40:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:01,474 INFO L225 Difference]: With dead ends: 24252 [2020-10-26 23:40:01,474 INFO L226 Difference]: Without dead ends: 12295 [2020-10-26 23:40:01,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-26 23:40:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2020-10-26 23:40:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 12235. [2020-10-26 23:40:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12235 states. [2020-10-26 23:40:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12235 states to 12235 states and 14222 transitions. [2020-10-26 23:40:01,820 INFO L78 Accepts]: Start accepts. Automaton has 12235 states and 14222 transitions. Word has length 583 [2020-10-26 23:40:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:01,821 INFO L481 AbstractCegarLoop]: Abstraction has 12235 states and 14222 transitions. [2020-10-26 23:40:01,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 23:40:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 12235 states and 14222 transitions. [2020-10-26 23:40:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2020-10-26 23:40:01,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:01,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:01,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:40:01,832 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 806225313, now seen corresponding path program 1 times [2020-10-26 23:40:01,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:01,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919421093] [2020-10-26 23:40:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:02,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 636 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3251 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 486 [2020-10-26 23:40:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:40:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:05,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:05,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:05,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:05,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:40:05,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:05,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:05,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:40:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:05,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-26 23:40:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:06,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-10-26 23:40:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:06,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:06,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:40:06,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:06,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 23:40:06,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:06,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:06,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:40:06,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-26 23:40:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919421093] [2020-10-26 23:40:06,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:06,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:06,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398673482] [2020-10-26 23:40:06,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:06,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:06,946 INFO L87 Difference]: Start difference. First operand 12235 states and 14222 transitions. Second operand 7 states. [2020-10-26 23:40:09,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:40:10,755 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:40:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:24,110 INFO L93 Difference]: Finished difference Result 28897 states and 34083 transitions. [2020-10-26 23:40:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:40:24,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 620 [2020-10-26 23:40:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:24,183 INFO L225 Difference]: With dead ends: 28897 [2020-10-26 23:40:24,184 INFO L226 Difference]: Without dead ends: 16975 [2020-10-26 23:40:24,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:40:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-10-26 23:40:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 16629. [2020-10-26 23:40:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16629 states. [2020-10-26 23:40:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16629 states to 16629 states and 19369 transitions. [2020-10-26 23:40:24,665 INFO L78 Accepts]: Start accepts. Automaton has 16629 states and 19369 transitions. Word has length 620 [2020-10-26 23:40:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:24,666 INFO L481 AbstractCegarLoop]: Abstraction has 16629 states and 19369 transitions. [2020-10-26 23:40:24,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 16629 states and 19369 transitions. [2020-10-26 23:40:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2020-10-26 23:40:24,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:24,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:40:24,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1226564117, now seen corresponding path program 1 times [2020-10-26 23:40:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562728249] [2020-10-26 23:40:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:25,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 641 [2020-10-26 23:40:28,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3283 [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 491 [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:40:28,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:40:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:40:28,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:40:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:28,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-26 23:40:28,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:28,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2020-10-26 23:40:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:29,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:40:29,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0