/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:48:33,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:48:33,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:48:33,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:48:33,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:48:33,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:48:33,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:48:33,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:48:33,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:48:33,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:48:33,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:48:33,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:48:33,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:48:33,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:48:33,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:48:33,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:48:33,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:48:33,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:48:33,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:48:33,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:48:33,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:48:33,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:48:33,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:48:33,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:48:33,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:48:33,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:48:33,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:48:33,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:48:33,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:48:33,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:48:33,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:48:33,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:48:33,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:48:33,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:48:33,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:48:33,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:48:33,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:48:33,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:48:33,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:48:33,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:48:33,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:48:33,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:48:33,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:48:33,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:48:33,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:48:33,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:48:33,894 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:48:33,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:48:33,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:48:33,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:48:33,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:48:33,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:48:33,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:48:33,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:48:33,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:48:33,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:48:33,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:48:33,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:48:33,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:48:33,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:48:33,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:48:33,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:48:33,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:48:33,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:48:33,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:48:33,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:48:33,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:48:33,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:48:33,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:48:33,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:48:33,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:48:33,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:48:34,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:48:34,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:48:34,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:48:34,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:48:34,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:48:34,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep_simple.i [2020-10-26 19:48:34,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dba629a4/4de91f1f9cd544aebdd6b27e7782c8d5/FLAG9c9b35e3e [2020-10-26 19:48:35,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:48:35,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep_simple.i [2020-10-26 19:48:35,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dba629a4/4de91f1f9cd544aebdd6b27e7782c8d5/FLAG9c9b35e3e [2020-10-26 19:48:35,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dba629a4/4de91f1f9cd544aebdd6b27e7782c8d5 [2020-10-26 19:48:35,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:48:35,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:48:35,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:48:35,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:48:35,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:48:35,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f50adca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35, skipping insertion in model container [2020-10-26 19:48:35,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:48:35,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:48:35,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:48:35,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:48:35,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:48:35,701 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:48:35,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35 WrapperNode [2020-10-26 19:48:35,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:48:35,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:48:35,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:48:35,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:48:35,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... [2020-10-26 19:48:35,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:48:35,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:48:35,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:48:35,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:48:35,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:48:35,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:48:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:48:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:48:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:48:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-26 19:48:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:48:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:48:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:48:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:48:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:48:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:48:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:48:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:48:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:48:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-26 19:48:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:48:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:48:36,254 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:48:36,254 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:48:36,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:48:36 BoogieIcfgContainer [2020-10-26 19:48:36,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:48:36,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:48:36,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:48:36,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:48:36,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:48:35" (1/3) ... [2020-10-26 19:48:36,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576a3142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:48:36, skipping insertion in model container [2020-10-26 19:48:36,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:35" (2/3) ... [2020-10-26 19:48:36,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576a3142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:48:36, skipping insertion in model container [2020-10-26 19:48:36,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:48:36" (3/3) ... [2020-10-26 19:48:36,267 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2020-10-26 19:48:36,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:48:36,291 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:48:36,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:48:36,344 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:48:36,345 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:48:36,345 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:48:36,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:48:36,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:48:36,345 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:48:36,346 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:48:36,346 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:48:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:48:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:48:36,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:36,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:36,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1917384497, now seen corresponding path program 1 times [2020-10-26 19:48:36,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:36,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849128483] [2020-10-26 19:48:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:36,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:36,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:48:36,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-26 19:48:36,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:36,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:36,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 19:48:36,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:36,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:48:37,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:37,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:37,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:48:37,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:48:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:37,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:48:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:48:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:37,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:48:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:37,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849128483] [2020-10-26 19:48:37,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:48:37,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:48:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295124300] [2020-10-26 19:48:37,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:48:37,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:48:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:48:37,175 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-26 19:48:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:37,503 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-10-26 19:48:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:48:37,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 19:48:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:37,516 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:48:37,516 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:48:37,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:48:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:48:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-10-26 19:48:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:48:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:48:37,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-26 19:48:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:37,571 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:48:37,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:48:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:48:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:48:37,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:37,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:37,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:48:37,574 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1115967253, now seen corresponding path program 1 times [2020-10-26 19:48:37,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:37,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316256476] [2020-10-26 19:48:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:48:37,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:37,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 19:48:37,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:48:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:48:37,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:37,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:48:37,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:37,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:48:37,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:48:37,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:37,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:48:37,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:37,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316256476] [2020-10-26 19:48:37,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:48:37,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:48:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692386634] [2020-10-26 19:48:37,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:48:37,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:48:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:48:37,992 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-26 19:48:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:38,487 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-26 19:48:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:48:38,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:48:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:38,490 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:48:38,490 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:48:38,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:48:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:48:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:48:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:48:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-26 19:48:38,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-26 19:48:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:38,506 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-26 19:48:38,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:48:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-26 19:48:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:48:38,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:38,507 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] [2020-10-26 19:48:38,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:48:38,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -891180873, now seen corresponding path program 1 times [2020-10-26 19:48:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:38,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964484222] [2020-10-26 19:48:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:38,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:38,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:38,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:48:38,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:38,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-26 19:48:38,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:48:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:48:38,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:38,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:38,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:48:38,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:48:38,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:38,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:38,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:38,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 19:48:38,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:38,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:48:38,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:38,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:48:38,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:38,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:48:38,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:39,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964484222] [2020-10-26 19:48:39,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:39,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:48:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55606361] [2020-10-26 19:48:39,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:48:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:48:39,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:48:39,118 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-10-26 19:48:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:39,660 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-26 19:48:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:48:39,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:48:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:39,662 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:48:39,662 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:48:39,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:48:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:48:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:48:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:48:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:48:39,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-26 19:48:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:39,673 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:48:39,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:48:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:48:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:48:39,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:39,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:39,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:48:39,675 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:39,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1320214055, now seen corresponding path program 2 times [2020-10-26 19:48:39,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:39,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89320850] [2020-10-26 19:48:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:48:40,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-26 19:48:40,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:48:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:40,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:40,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:40,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:40,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 19:48:40,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:48:40,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:40,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:48:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89320850] [2020-10-26 19:48:40,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:40,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:48:40,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691857039] [2020-10-26 19:48:40,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:48:40,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:40,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:48:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:48:40,307 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-10-26 19:48:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:40,870 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-26 19:48:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:48:40,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-26 19:48:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:40,872 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:48:40,872 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:48:40,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:48:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:48:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:48:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:48:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:48:40,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-26 19:48:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:40,882 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:48:40,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:48:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:48:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:48:40,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:40,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:40,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:48:40,884 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1304241541, now seen corresponding path program 3 times [2020-10-26 19:48:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:40,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248907158] [2020-10-26 19:48:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:48:41,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-26 19:48:41,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:48:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:48:41,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:41,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:41,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:41,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:48:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:48:41,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:48:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:48:41,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248907158] [2020-10-26 19:48:41,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:41,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:48:41,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324874459] [2020-10-26 19:48:41,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:48:41,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:41,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:48:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:48:41,378 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-26 19:48:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:42,015 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-26 19:48:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:48:42,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-26 19:48:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:42,018 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:48:42,019 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:48:42,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:48:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:48:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:48:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:48:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:48:42,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-26 19:48:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:42,028 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:48:42,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:48:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:48:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:48:42,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:42,029 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:42,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:48:42,030 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1160442525, now seen corresponding path program 4 times [2020-10-26 19:48:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:42,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391396842] [2020-10-26 19:48:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:48:42,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 19:48:42,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:42,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 19:48:42,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:48:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:48:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391396842] [2020-10-26 19:48:42,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:42,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:48:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950460179] [2020-10-26 19:48:42,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:48:42,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:48:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:48:42,576 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-26 19:48:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:43,284 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-26 19:48:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:48:43,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 19:48:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:43,286 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:48:43,286 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:48:43,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:48:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:48:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:48:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:48:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:48:43,295 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-26 19:48:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:43,296 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:48:43,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:48:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:48:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:48:43,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:43,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:43,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:48:43,298 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1100117441, now seen corresponding path program 5 times [2020-10-26 19:48:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:43,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547396178] [2020-10-26 19:48:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:48:43,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:48:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:43,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:43,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 19:48:43,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:43,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:48:43,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:48:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:48:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:43,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547396178] [2020-10-26 19:48:43,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:43,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:48:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928419130] [2020-10-26 19:48:43,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:48:43,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:48:43,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:48:43,932 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2020-10-26 19:48:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:44,714 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-26 19:48:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:48:44,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:48:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:44,717 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:48:44,717 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:48:44,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:48:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:48:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:48:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:48:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:48:44,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-26 19:48:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:48:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:48:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:48:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:48:44,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:44,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:44,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:48:44,730 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash -244792991, now seen corresponding path program 6 times [2020-10-26 19:48:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:44,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627454590] [2020-10-26 19:48:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:48:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 19:48:45,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:48:45,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:48:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:48:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627454590] [2020-10-26 19:48:46,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:46,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:48:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276409792] [2020-10-26 19:48:46,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:48:46,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:48:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:48:46,026 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2020-10-26 19:48:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:47,071 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:48:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:48:47,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:48:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:47,074 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:48:47,074 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:48:47,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:48:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:48:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:48:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:48:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 19:48:47,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-26 19:48:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:47,085 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 19:48:47,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:48:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 19:48:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:48:47,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:47,086 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:47,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:48:47,087 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1383249923, now seen corresponding path program 7 times [2020-10-26 19:48:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:47,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128360551] [2020-10-26 19:48:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:47,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:48:47,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-26 19:48:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:48:47,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:47,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:47,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:47,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:47,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:47,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 19:48:47,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:48:47,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:48,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128360551] [2020-10-26 19:48:48,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:48,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:48:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162314682] [2020-10-26 19:48:48,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:48:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:48:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:48:48,020 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2020-10-26 19:48:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:48,974 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:48:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:48:48,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:48:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:48,979 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:48:48,979 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:48:48,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:48:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:48:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:48:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:48:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:48:48,995 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-26 19:48:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:48,995 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:48:48,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:48:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:48:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:48:48,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:48,998 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:48,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:48:48,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1730572763, now seen corresponding path program 8 times [2020-10-26 19:48:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:48,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427305249] [2020-10-26 19:48:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:48:49,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:49,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-26 19:48:49,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:48:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:48:49,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:49,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:49,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:48:49,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:49,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-26 19:48:49,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:48:49,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:48:49,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:48:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:50,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427305249] [2020-10-26 19:48:50,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:50,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:48:50,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127656523] [2020-10-26 19:48:50,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:48:50,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:48:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:48:50,565 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2020-10-26 19:48:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:51,803 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-26 19:48:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:48:51,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:48:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:51,807 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:48:51,807 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:48:51,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:48:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:48:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:48:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:48:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-26 19:48:51,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-26 19:48:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:51,820 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-26 19:48:51,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:48:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-26 19:48:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:48:51,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:51,822 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:51,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:48:51,822 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash -521968697, now seen corresponding path program 9 times [2020-10-26 19:48:51,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:51,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89315075] [2020-10-26 19:48:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:51,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:51,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:52,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:52,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:48:52,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:52,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-26 19:48:52,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:48:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:48:52,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:52,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:52,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:52,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:52,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:52,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:52,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:48:52,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:48:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:52,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89315075] [2020-10-26 19:48:52,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:52,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:48:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528956108] [2020-10-26 19:48:52,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:48:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:48:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:48:52,947 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2020-10-26 19:48:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:53,962 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-26 19:48:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:48:53,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-26 19:48:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:53,965 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:48:53,965 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:48:53,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:48:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:48:53,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:48:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:48:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:48:53,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-26 19:48:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:53,987 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:48:53,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:48:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:48:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:48:53,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:53,989 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:53,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:48:53,989 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1305368809, now seen corresponding path program 10 times [2020-10-26 19:48:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:53,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666587840] [2020-10-26 19:48:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:54,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:54,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:48:54,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:54,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-26 19:48:54,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:48:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:48:54,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:54,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:54,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:54,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:54,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:54,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:54,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:54,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:55,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:55,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:48:55,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:48:55,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:48:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:48:55,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666587840] [2020-10-26 19:48:55,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:55,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:48:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828517274] [2020-10-26 19:48:55,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:48:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:48:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:48:55,867 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2020-10-26 19:48:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:57,404 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:48:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:48:57,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-26 19:48:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:57,407 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:48:57,407 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:48:57,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:48:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:48:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:48:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:48:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:48:57,416 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-26 19:48:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:57,417 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:48:57,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:48:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:48:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:48:57,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:57,418 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:57,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:48:57,419 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash 735088011, now seen corresponding path program 11 times [2020-10-26 19:48:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:57,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538222873] [2020-10-26 19:48:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:57,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:48:58,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-26 19:48:58,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:48:58,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:58,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:48:58,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:58,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:58,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:58,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:58,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:48:58,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:58,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-26 19:48:58,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:48:58,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:58,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:48:58,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538222873] [2020-10-26 19:48:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:58,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:48:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214069679] [2020-10-26 19:48:58,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:48:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:48:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:48:58,895 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-10-26 19:49:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:00,210 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:49:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:49:00,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 19:49:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:00,212 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:49:00,212 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:49:00,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:49:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:49:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:49:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:49:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:49:00,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-26 19:49:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:00,230 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:49:00,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:49:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:49:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:49:00,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:00,231 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:00,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:49:00,232 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:00,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1843912275, now seen corresponding path program 12 times [2020-10-26 19:49:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:00,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125851608] [2020-10-26 19:49:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:49:01,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:49:01,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:01,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:01,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:01,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:01,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:01,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:01,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:01,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:49:01,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:01,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 19:49:01,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:49:01,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:01,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:49:01,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:01,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125851608] [2020-10-26 19:49:01,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:01,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:49:01,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720578253] [2020-10-26 19:49:01,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:49:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:49:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:49:01,972 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 18 states. [2020-10-26 19:49:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:03,399 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-26 19:49:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:49:03,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-26 19:49:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:03,402 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:49:03,403 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:49:03,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=360, Invalid=762, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:49:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:49:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:49:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:49:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:49:03,411 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-26 19:49:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:03,412 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:49:03,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:49:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:49:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:49:03,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:03,413 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:03,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:49:03,414 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:03,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2067057329, now seen corresponding path program 13 times [2020-10-26 19:49:03,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:03,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842933886] [2020-10-26 19:49:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:03,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:04,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:04,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:49:04,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:04,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-26 19:49:04,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:04,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:49:04,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:04,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:49:04,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:04,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:04,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:04,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:04,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:04,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:49:04,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 19:49:04,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:49:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:49:04,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:05,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842933886] [2020-10-26 19:49:05,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:05,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:49:05,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716654329] [2020-10-26 19:49:05,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:49:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:49:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:49:05,147 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 19 states. [2020-10-26 19:49:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:06,551 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 19:49:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:49:06,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:49:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:06,553 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:49:06,553 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:49:06,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:49:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:49:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:49:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:49:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:49:06,571 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-26 19:49:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:06,571 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:49:06,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:49:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:49:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:49:06,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:06,573 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:06,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:49:06,573 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1761089423, now seen corresponding path program 14 times [2020-10-26 19:49:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:06,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072980347] [2020-10-26 19:49:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1117 [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:07,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:49:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:49:07,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:07,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:07,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:49:07,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:07,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:49:08,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:08,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:49:08,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072980347] [2020-10-26 19:49:09,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:09,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:49:09,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357974463] [2020-10-26 19:49:09,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:49:09,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:49:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:49:09,268 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2020-10-26 19:49:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:11,164 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-26 19:49:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:49:11,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:49:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:11,167 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:49:11,167 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:49:11,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:49:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:49:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:49:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:49:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-26 19:49:11,175 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-26 19:49:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:11,175 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-26 19:49:11,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:49:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-26 19:49:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:49:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:11,176 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:11,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:49:11,177 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 216292115, now seen corresponding path program 15 times [2020-10-26 19:49:11,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:11,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220501606] [2020-10-26 19:49:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:11,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:12,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:12,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:49:12,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:12,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-26 19:49:12,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:49:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:12,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:49:12,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:49:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:12,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:12,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:12,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:12,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:12,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:49:12,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:12,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:49:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:12,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:12,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:49:12,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:49:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220501606] [2020-10-26 19:49:13,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:13,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:49:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470369432] [2020-10-26 19:49:13,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:49:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:49:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:49:13,402 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2020-10-26 19:49:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:15,105 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-26 19:49:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:49:15,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-26 19:49:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:15,107 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:49:15,107 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:49:15,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=510, Invalid=1050, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:49:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:49:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:49:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:49:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:49:15,119 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-26 19:49:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:15,120 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:49:15,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:49:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:49:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:49:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:15,121 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:49:15,121 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2104405301, now seen corresponding path program 16 times [2020-10-26 19:49:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:15,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371818659] [2020-10-26 19:49:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:15,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:15,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:16,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:16,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:49:16,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:49:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:16,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:16,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:16,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:16,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:16,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:16,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:16,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:16,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:16,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:16,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:17,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:17,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:49:17,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-26 19:49:17,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:49:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:49:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:18,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371818659] [2020-10-26 19:49:18,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:18,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:49:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20585265] [2020-10-26 19:49:18,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:49:18,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:49:18,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:49:18,456 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 22 states. [2020-10-26 19:49:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:20,824 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-26 19:49:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:49:20,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 19:49:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:20,826 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:49:20,826 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:49:20,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=598, Invalid=1124, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:49:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:49:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:49:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:49:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-26 19:49:20,834 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-26 19:49:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:20,834 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-26 19:49:20,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:49:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-26 19:49:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:49:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:20,836 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:20,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:49:20,836 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -189989161, now seen corresponding path program 17 times [2020-10-26 19:49:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:20,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290266554] [2020-10-26 19:49:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:49:22,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1436 [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:49:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:49:22,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:49:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:23,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290266554] [2020-10-26 19:49:23,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:23,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:49:23,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460037113] [2020-10-26 19:49:23,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:49:23,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:49:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:49:23,377 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 23 states. [2020-10-26 19:49:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:25,436 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-26 19:49:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:49:25,437 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:49:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:25,438 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:49:25,438 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:49:25,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=1267, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:49:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:49:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:49:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:49:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:49:25,448 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-26 19:49:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:25,448 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:49:25,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:49:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:49:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:49:25,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:25,449 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:25,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:49:25,450 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1784844295, now seen corresponding path program 18 times [2020-10-26 19:49:25,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:25,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280074642] [2020-10-26 19:49:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:25,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:26,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:49:26,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:26,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:26,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:26,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:26,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:26,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:27,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:49:27,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:28,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280074642] [2020-10-26 19:49:28,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:28,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:49:28,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461027290] [2020-10-26 19:49:28,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:49:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:49:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:49:28,052 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 24 states. [2020-10-26 19:49:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:29,987 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-26 19:49:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:49:29,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-26 19:49:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:29,990 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:49:29,990 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:49:29,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=687, Invalid=1383, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:49:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:49:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:49:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:49:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-26 19:49:29,997 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-26 19:49:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:29,998 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-26 19:49:29,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:49:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-26 19:49:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:49:29,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:29,999 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:29,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:49:29,999 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1137303397, now seen corresponding path program 19 times [2020-10-26 19:49:30,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:30,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305084834] [2020-10-26 19:49:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:31,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1267 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:31,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:49:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:31,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:31,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:31,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:31,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:31,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:31,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:49:31,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:31,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-26 19:49:31,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:49:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:49:31,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:49:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:32,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305084834] [2020-10-26 19:49:32,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:32,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:49:32,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445650839] [2020-10-26 19:49:32,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:49:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:49:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:49:32,747 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 25 states. [2020-10-26 19:49:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:35,045 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-26 19:49:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:49:35,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-26 19:49:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:35,047 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:49:35,047 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:49:35,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:49:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:49:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:49:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:49:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-26 19:49:35,055 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-26 19:49:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:35,055 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-26 19:49:35,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:49:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-26 19:49:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:49:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:35,056 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:49:35,056 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1620758339, now seen corresponding path program 20 times [2020-10-26 19:49:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504404283] [2020-10-26 19:49:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:35,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:36,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1245 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:49:36,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:36,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:36,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:36,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:36,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:36,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:36,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:49:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-26 19:49:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:49:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:49:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:37,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504404283] [2020-10-26 19:49:37,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:37,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:49:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102509248] [2020-10-26 19:49:37,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:49:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:49:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:49:37,698 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 26 states. [2020-10-26 19:49:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:40,106 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 19:49:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:49:40,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-26 19:49:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:40,113 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:49:40,113 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:49:40,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=820, Invalid=1630, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:49:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:49:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:49:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:49:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-26 19:49:40,120 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-26 19:49:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:40,120 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-26 19:49:40,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:49:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-26 19:49:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:49:40,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:40,121 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:40,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:49:40,122 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1930477663, now seen corresponding path program 21 times [2020-10-26 19:49:40,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:40,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856406425] [2020-10-26 19:49:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:49:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:49:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:41,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:41,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:41,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:41,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:41,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:42,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:42,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:49:42,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:42,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-26 19:49:42,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:49:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:49:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:44,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856406425] [2020-10-26 19:49:44,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:44,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:49:44,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387965449] [2020-10-26 19:49:44,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:49:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:49:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:49:44,463 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 27 states. [2020-10-26 19:49:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:47,609 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-26 19:49:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:49:47,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:49:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:47,612 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:49:47,612 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:49:47,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=933, Invalid=1719, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:49:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:49:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:49:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:49:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-26 19:49:47,622 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-26 19:49:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:47,623 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-26 19:49:47,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:49:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-26 19:49:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:49:47,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:47,623 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:47,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:49:47,624 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash 169275265, now seen corresponding path program 22 times [2020-10-26 19:49:47,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:47,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555242998] [2020-10-26 19:49:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:47,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:49:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:49:49,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:49,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:49,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:49,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:49:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:49:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:50,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555242998] [2020-10-26 19:49:50,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:50,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:49:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120006092] [2020-10-26 19:49:50,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:49:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:49:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:49:50,790 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 28 states. [2020-10-26 19:49:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:53,466 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-26 19:49:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:49:53,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-26 19:49:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:53,468 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:49:53,469 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:49:53,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=965, Invalid=1897, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:49:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:49:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:49:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:49:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:49:53,477 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-26 19:49:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:53,478 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:49:53,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:49:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:49:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:49:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:53,478 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:53,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:49:53,479 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash -129114589, now seen corresponding path program 23 times [2020-10-26 19:49:53,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:53,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247416949] [2020-10-26 19:49:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:55,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:49:55,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:55,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:55,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:55,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:55,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:55,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:55,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:55,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:49:55,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:55,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:49:55,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:57,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247416949] [2020-10-26 19:49:57,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:57,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:49:57,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682443315] [2020-10-26 19:49:57,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:49:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:49:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:49:57,021 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 29 states. [2020-10-26 19:49:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:59,901 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-26 19:49:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:49:59,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-26 19:49:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:59,903 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:49:59,903 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:49:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1042, Invalid=2038, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:49:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:49:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:49:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:49:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-26 19:49:59,912 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-26 19:49:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:59,912 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-26 19:49:59,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:49:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-26 19:49:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:49:59,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:59,913 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:59,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:49:59,914 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 881044549, now seen corresponding path program 24 times [2020-10-26 19:49:59,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:59,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008372576] [2020-10-26 19:49:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:01,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1820 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:50:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:01,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:01,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:01,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:01,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:01,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:02,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:02,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:50:02,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:02,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-26 19:50:02,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:50:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:50:02,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008372576] [2020-10-26 19:50:03,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:03,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:50:03,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183813176] [2020-10-26 19:50:03,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:50:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:50:03,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:50:03,406 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 30 states. [2020-10-26 19:50:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:06,446 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-26 19:50:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:50:06,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:50:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:06,449 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:50:06,450 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:50:06,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1122, Invalid=2184, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:50:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:50:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:50:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:50:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-26 19:50:06,457 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-26 19:50:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:06,458 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-26 19:50:06,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:50:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-26 19:50:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:50:06,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:06,458 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:06,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:50:06,459 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash 981367271, now seen corresponding path program 25 times [2020-10-26 19:50:06,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:06,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913624136] [2020-10-26 19:50:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:08,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:50:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:08,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:50:09,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:11,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913624136] [2020-10-26 19:50:11,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:11,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:50:11,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522187685] [2020-10-26 19:50:11,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:50:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:50:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:50:11,692 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 31 states. [2020-10-26 19:50:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:15,522 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-26 19:50:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:50:15,523 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-26 19:50:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:15,524 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:50:15,524 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:50:15,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1255, Invalid=2285, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:50:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:50:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:50:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:50:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-26 19:50:15,534 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-26 19:50:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:15,534 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-26 19:50:15,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:50:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-26 19:50:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:50:15,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:15,535 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:15,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:50:15,535 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1392744695, now seen corresponding path program 26 times [2020-10-26 19:50:15,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:15,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507740711] [2020-10-26 19:50:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:15,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:15,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:50:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:17,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:17,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:17,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:17,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:17,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:17,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:18,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:18,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:50:18,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:18,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-26 19:50:18,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:50:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:50:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:19,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507740711] [2020-10-26 19:50:19,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:19,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:50:19,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436109801] [2020-10-26 19:50:19,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:50:19,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:50:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:50:19,616 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 32 states. [2020-10-26 19:50:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:22,924 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-26 19:50:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:50:22,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-26 19:50:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:22,927 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:50:22,927 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:50:22,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1291, Invalid=2491, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:50:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:50:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:50:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:50:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-26 19:50:22,936 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-26 19:50:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:22,936 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-26 19:50:22,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:50:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-26 19:50:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:50:22,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:22,938 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:22,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:50:22,938 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2008257451, now seen corresponding path program 27 times [2020-10-26 19:50:22,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:22,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911035716] [2020-10-26 19:50:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:22,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:25,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2404 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:50:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:25,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:25,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:25,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:25,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:26,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:26,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:50:26,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:26,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-26 19:50:26,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:50:26,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911035716] [2020-10-26 19:50:27,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:27,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:50:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704987818] [2020-10-26 19:50:27,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:50:27,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:50:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:50:27,387 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 33 states. [2020-10-26 19:50:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:30,899 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-26 19:50:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:50:30,900 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-26 19:50:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:30,901 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:50:30,902 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:50:30,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1380, Invalid=2652, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:50:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:50:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:50:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:50:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-26 19:50:30,911 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-26 19:50:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:30,912 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-26 19:50:30,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:50:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-26 19:50:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:50:30,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:30,913 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:30,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:50:30,913 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1901207501, now seen corresponding path program 28 times [2020-10-26 19:50:30,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:30,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785482545] [2020-10-26 19:50:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:30,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:33,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:33,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:50:33,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:33,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-26 19:50:33,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:33,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:50:33,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:33,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:50:33,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:33,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:33,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:33,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:33,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:33,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:33,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:33,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:33,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:33,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:33,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:50:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:50:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:35,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785482545] [2020-10-26 19:50:35,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:35,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:50:35,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298369213] [2020-10-26 19:50:35,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:50:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:50:35,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:50:35,612 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 34 states. [2020-10-26 19:50:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:39,248 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-26 19:50:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:50:39,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-26 19:50:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:39,250 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:50:39,251 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:50:39,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1472, Invalid=2818, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:50:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:50:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:50:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:50:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-26 19:50:39,260 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-26 19:50:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:39,260 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-26 19:50:39,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:50:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-26 19:50:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:50:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:39,261 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:39,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:50:39,261 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2105420655, now seen corresponding path program 29 times [2020-10-26 19:50:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855745298] [2020-10-26 19:50:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:39,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:41,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:41,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:50:41,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:41,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2577 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:41,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:41,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:41,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:42,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:42,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:50:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:44,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855745298] [2020-10-26 19:50:44,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:44,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:50:44,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837850260] [2020-10-26 19:50:44,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:50:44,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:50:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:50:44,231 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 35 states. [2020-10-26 19:50:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:48,026 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:50:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:50:48,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-26 19:50:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:48,028 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:50:48,029 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:50:48,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1567, Invalid=2989, Unknown=0, NotChecked=0, Total=4556 [2020-10-26 19:50:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:50:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:50:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:50:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-26 19:50:48,037 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-26 19:50:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:48,037 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-26 19:50:48,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:50:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-26 19:50:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:50:48,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:48,038 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:48,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:50:48,038 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 785766033, now seen corresponding path program 30 times [2020-10-26 19:50:48,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:48,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933116482] [2020-10-26 19:50:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:48,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2739 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:50:50,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:50,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:50,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:50,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:50,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:50:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:50:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:53,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933116482] [2020-10-26 19:50:53,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:53,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:50:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717061867] [2020-10-26 19:50:53,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:50:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:50:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:50:53,545 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 36 states. [2020-10-26 19:50:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:57,578 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-26 19:50:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:50:57,579 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-26 19:50:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:57,580 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:50:57,580 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:50:57,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1665, Invalid=3165, Unknown=0, NotChecked=0, Total=4830 [2020-10-26 19:50:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:50:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:50:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:50:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-26 19:50:57,589 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-26 19:50:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:57,589 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-26 19:50:57,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:50:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-26 19:50:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:50:57,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:57,590 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:57,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:50:57,590 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash -386973389, now seen corresponding path program 31 times [2020-10-26 19:50:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855172797] [2020-10-26 19:50:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3127 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:51:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:00,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:00,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:00,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:00,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:00,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:51:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:05,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855172797] [2020-10-26 19:51:05,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:05,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:51:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109204326] [2020-10-26 19:51:05,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:51:05,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:51:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:51:05,373 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 37 states. [2020-10-26 19:51:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:10,003 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-26 19:51:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:51:10,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-26 19:51:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:10,005 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:51:10,005 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:51:10,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1828, Invalid=3284, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:51:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:51:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:51:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:51:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-26 19:51:10,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-26 19:51:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:10,020 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-26 19:51:10,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:51:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-26 19:51:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:51:10,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:10,021 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:10,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:51:10,021 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2108126379, now seen corresponding path program 32 times [2020-10-26 19:51:10,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:10,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525452534] [2020-10-26 19:51:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3460 [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:51:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:51:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:13,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:13,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:13,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:13,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:13,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:13,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:13,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:13,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:13,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:13,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:13,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:13,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:13,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:14,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:51:14,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:18,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525452534] [2020-10-26 19:51:18,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:18,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:51:18,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220865335] [2020-10-26 19:51:18,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:51:18,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:18,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:51:18,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:51:18,457 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 38 states. [2020-10-26 19:51:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:23,876 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-26 19:51:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:51:23,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:51:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:23,878 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:51:23,878 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:51:23,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1934, Invalid=3468, Unknown=0, NotChecked=0, Total=5402 [2020-10-26 19:51:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:51:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:51:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:51:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-26 19:51:23,886 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-26 19:51:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:23,886 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-26 19:51:23,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:51:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-26 19:51:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:51:23,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:23,887 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:23,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:51:23,887 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1721226487, now seen corresponding path program 33 times [2020-10-26 19:51:23,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:23,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461753572] [2020-10-26 19:51:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:27,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:27,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:51:27,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:27,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3756 [2020-10-26 19:51:27,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:27,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:51:27,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:27,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:51:27,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:27,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:27,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:27,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:27,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:28,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:28,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:51:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:30,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461753572] [2020-10-26 19:51:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:30,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:51:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44972527] [2020-10-26 19:51:30,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:51:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:51:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:51:30,708 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 39 states. [2020-10-26 19:51:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:35,018 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-26 19:51:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:51:35,019 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2020-10-26 19:51:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:35,021 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:51:35,021 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:51:35,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1977, Invalid=3723, Unknown=0, NotChecked=0, Total=5700 [2020-10-26 19:51:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:51:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:51:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:51:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-26 19:51:35,031 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-26 19:51:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:35,031 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-26 19:51:35,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:51:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-26 19:51:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:51:35,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:35,032 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:35,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:51:35,032 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 942358041, now seen corresponding path program 34 times [2020-10-26 19:51:35,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:35,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152171234] [2020-10-26 19:51:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4098 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:51:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:39,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:39,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:39,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:39,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:51:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:51:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:44,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152171234] [2020-10-26 19:51:44,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:44,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:51:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957578066] [2020-10-26 19:51:44,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:51:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:51:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:51:44,616 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 40 states. [2020-10-26 19:51:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:50,004 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-26 19:51:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:51:50,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-10-26 19:51:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:50,006 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:51:50,006 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:51:50,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2155, Invalid=3851, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:51:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:51:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:51:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:51:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-26 19:51:50,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-26 19:51:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:50,017 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-26 19:51:50,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:51:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-26 19:51:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:51:50,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:50,018 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:50,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:51:50,018 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash -225909061, now seen corresponding path program 35 times [2020-10-26 19:51:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:50,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565739300] [2020-10-26 19:51:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:50,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4238 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:51:54,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:54,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:54,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:54,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:54,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:54,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:54,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:55,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:51:55,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:57,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565739300] [2020-10-26 19:51:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:51:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774792553] [2020-10-26 19:51:57,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:51:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:51:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:51:57,829 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 41 states. [2020-10-26 19:52:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:02,482 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-26 19:52:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:52:02,483 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2020-10-26 19:52:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:02,485 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:52:02,485 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:52:02,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2200, Invalid=4120, Unknown=0, NotChecked=0, Total=6320 [2020-10-26 19:52:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:52:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:52:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:52:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-26 19:52:02,496 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-26 19:52:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:02,496 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-26 19:52:02,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:52:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-26 19:52:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:52:02,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:02,497 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:02,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:52:02,498 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1944129827, now seen corresponding path program 36 times [2020-10-26 19:52:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:02,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159067145] [2020-10-26 19:52:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:02,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:07,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:07,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:52:07,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:07,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:52:07,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:52:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:52:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:07,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:07,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:07,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:07,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:07,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:52:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:52:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:13,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159067145] [2020-10-26 19:52:13,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:13,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:52:13,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343985273] [2020-10-26 19:52:13,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:52:13,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:52:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:52:13,836 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2020-10-26 19:52:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:20,497 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-26 19:52:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:52:20,498 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2020-10-26 19:52:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:20,499 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:52:20,499 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:52:20,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2388, Invalid=4254, Unknown=0, NotChecked=0, Total=6642 [2020-10-26 19:52:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:52:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:52:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:52:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-26 19:52:20,509 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-26 19:52:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:20,510 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-26 19:52:20,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:52:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-26 19:52:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:52:20,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:20,511 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:20,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:52:20,511 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash 408123007, now seen corresponding path program 37 times [2020-10-26 19:52:20,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:20,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746069461] [2020-10-26 19:52:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:52:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:52:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:52:27,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:52:27,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:52:27,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0