/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-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:05:56,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:05:56,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:05:56,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:05:56,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:05:56,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:05:56,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:05:56,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:05:56,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:05:56,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:05:56,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:05:56,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:05:56,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:05:56,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:05:56,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:05:56,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:05:56,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:05:56,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:05:56,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:05:56,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:05:56,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:05:56,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:05:56,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:05:56,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:05:56,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:05:56,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:05:56,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:05:56,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:05:56,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:05:56,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:05:56,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:05:56,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:05:56,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:05:56,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:05:56,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:05:56,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:05:56,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:05:56,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:05:56,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:05:56,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:05:56,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:05:56,826 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 19:05:56,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:05:56,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:05:56,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:05:56,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:05:56,854 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:05:56,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:05:56,854 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:05:56,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:05:56,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:05:56,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:05:56,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:05:56,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:05:56,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:05:56,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:05:56,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:05:56,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:05:56,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:05:56,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:05:56,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:05:56,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:05:56,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:05:56,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:05:56,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:05:56,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:05:56,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:05:57,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:05:57,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:05:57,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:05:57,299 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:05:57,300 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:05:57,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor1.i [2020-10-26 19:05:57,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2b462b97/f4029df684904e4096373f7ba56cdc61/FLAG4b36d41b7 [2020-10-26 19:05:57,959 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:05:57,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/xor1.i [2020-10-26 19:05:57,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2b462b97/f4029df684904e4096373f7ba56cdc61/FLAG4b36d41b7 [2020-10-26 19:05:58,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2b462b97/f4029df684904e4096373f7ba56cdc61 [2020-10-26 19:05:58,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:05:58,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:05:58,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:05:58,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:05:58,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:05:58,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151fa72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58, skipping insertion in model container [2020-10-26 19:05:58,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:05:58,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:05:58,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:05:58,614 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:05:58,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:05:58,662 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:05:58,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58 WrapperNode [2020-10-26 19:05:58,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:05:58,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:05:58,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:05:58,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:05:58,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (1/1) ... [2020-10-26 19:05:58,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:05:58,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:05:58,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:05:58,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:05:58,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (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 19:05:58,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:05:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:05:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:05:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2020-10-26 19:05:58,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:05:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:05:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:05:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:05:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:05:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:05:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:05:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:05:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2020-10-26 19:05:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:05:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:05:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:05:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:05:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:05:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:05:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:05:59,311 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:05:59,311 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:05:59,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:05:59 BoogieIcfgContainer [2020-10-26 19:05:59,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:05:59,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:05:59,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:05:59,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:05:59,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:05:58" (1/3) ... [2020-10-26 19:05:59,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607f12cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:05:59, skipping insertion in model container [2020-10-26 19:05:59,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:05:58" (2/3) ... [2020-10-26 19:05:59,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607f12cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:05:59, skipping insertion in model container [2020-10-26 19:05:59,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:05:59" (3/3) ... [2020-10-26 19:05:59,324 INFO L111 eAbstractionObserver]: Analyzing ICFG xor1.i [2020-10-26 19:05:59,377 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:05:59,387 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:05:59,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:05:59,474 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:05:59,474 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:05:59,474 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:05:59,475 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:05:59,475 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:05:59,475 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:05:59,475 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:05:59,475 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:05:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:05:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:05:59,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:59,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:59,507 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1157692497, now seen corresponding path program 1 times [2020-10-26 19:05:59,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:59,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327030567] [2020-10-26 19:05:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:06:00,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:00,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-26 19:06:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:00,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:06:00,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:00,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:06:00,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:00,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:06:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:00,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:00,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:06:00,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:06:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:00,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:06:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:00,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:00,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:06:00,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:06:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:00,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:00,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:06:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:00,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:00,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:00,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:06:00,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:00,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:00,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:06:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:06:00,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327030567] [2020-10-26 19:06:00,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:00,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:06:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115420949] [2020-10-26 19:06:00,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:06:00,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:06:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:06:00,543 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:06:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:00,703 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:06:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:06:00,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:06:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:00,715 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:06:00,715 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:06:00,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:06:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:06:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:06:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:06:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:06:00,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:06:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:00,771 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:06:00,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:06:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:06:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:06:00,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:00,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:00,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:06:00,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1911757649, now seen corresponding path program 1 times [2020-10-26 19:06:00,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:00,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799576840] [2020-10-26 19:06:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:06:02,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:02,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-10-26 19:06:02,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:02,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:02,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:02,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:02,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:02,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:02,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:06:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:02,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:06:02,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:02,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:02,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:02,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:06:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:02,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:02,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:06:02,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:02,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:06:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:06:02,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:06:02,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:02,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:02,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:02,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:06:02,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799576840] [2020-10-26 19:06:02,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:06:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580789366] [2020-10-26 19:06:02,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:02,342 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:06:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:02,547 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:06:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:06:02,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:06:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:02,549 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:06:02,549 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:06:02,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:06:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:06:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:06:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:06:02,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:06:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:02,561 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:06:02,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:06:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:06:02,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:02,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:02,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:06:02,564 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2127198191, now seen corresponding path program 1 times [2020-10-26 19:06:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:02,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167048705] [2020-10-26 19:06:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:06,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:06,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:06:06,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:06,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4349 [2020-10-26 19:06:06,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 19:06:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:07,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:07,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:07,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:06:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:07,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:06:07,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:06:07,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:07,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:06:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:07,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:06:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:06:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:07,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:06:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:07,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:07,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:06:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:06:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:06:07,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167048705] [2020-10-26 19:06:07,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:07,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:06:07,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665857910] [2020-10-26 19:06:07,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:06:07,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:06:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:06:07,223 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:06:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:07,531 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:06:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:06:07,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:06:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:07,533 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:06:07,533 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:06:07,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:06:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:06:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:06:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:06:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:06:07,543 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:06:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:07,543 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:06:07,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:06:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:06:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:06:07,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:07,546 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:07,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:06:07,546 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 869573329, now seen corresponding path program 2 times [2020-10-26 19:06:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:07,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863225374] [2020-10-26 19:06:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:07,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:06:12,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:12,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:06:12,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:06:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:12,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:12,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:06:12,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:06:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:06:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:06:12,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 19:06:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:06:12,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:12,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:06:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:06:12,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:12,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:06:12,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:06:12,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:06:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:06:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:06:12,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:06:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:06:12,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863225374] [2020-10-26 19:06:12,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:12,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:06:12,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004703157] [2020-10-26 19:06:12,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:06:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:06:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:06:12,890 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:06:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:13,299 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:06:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:06:13,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:06:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:13,301 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:06:13,301 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:06:13,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:06:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:06:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:06:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:06:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:06:13,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:06:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:13,310 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:06:13,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:06:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:06:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:06:13,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:13,312 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:13,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:06:13,313 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 525822865, now seen corresponding path program 3 times [2020-10-26 19:06:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:13,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149729036] [2020-10-26 19:06:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:13,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:13,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:13,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:14,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:18,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:06:18,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:18,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:18,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:18,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:18,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:18,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:18,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:06:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:18,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:06:18,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:18,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:06:18,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:06:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:18,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:06:18,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:18,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:06:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:18,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:06:18,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:06:18,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:06:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:06:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:18,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:06:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:18,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:06:18,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:06:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:06:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:06:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:06:18,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149729036] [2020-10-26 19:06:18,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:18,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:06:18,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673203328] [2020-10-26 19:06:18,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:06:18,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:06:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:06:18,658 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:06:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:19,156 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:06:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:06:19,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:06:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:19,158 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:06:19,158 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:06:19,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:06:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:06:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:06:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:06:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:06:19,167 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:06:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:19,167 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:06:19,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:06:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:06:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:06:19,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:19,169 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:19,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:06:19,169 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash 677700177, now seen corresponding path program 4 times [2020-10-26 19:06:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:19,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985105143] [2020-10-26 19:06:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:19,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:24,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:06:24,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:06:24,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:06:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:06:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:24,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:24,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:24,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:24,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:24,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:24,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:24,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:06:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:24,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:06:24,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 19:06:24,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:06:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:06:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:24,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:06:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:24,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:06:24,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:06:24,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:24,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:06:24,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:24,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:06:24,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:24,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:06:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:24,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:06:24,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:24,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:06:24,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:06:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:24,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:06:24,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:06:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985105143] [2020-10-26 19:06:24,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:24,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:06:24,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058659729] [2020-10-26 19:06:24,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:06:24,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:06:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:06:24,648 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:06:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:25,227 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:06:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:25,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:06:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:25,229 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:06:25,229 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:06:25,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:06:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:06:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:06:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:06:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:06:25,237 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:06:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:25,238 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:06:25,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:06:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:06:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:06:25,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:25,239 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:25,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:06:25,240 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1925449489, now seen corresponding path program 5 times [2020-10-26 19:06:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762165987] [2020-10-26 19:06:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:25,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:25,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:30,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:06:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:06:30,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:06:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:30,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:30,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:30,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:30,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:30,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:30,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:06:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:30,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:06:30,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:30,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:06:30,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:06:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:30,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:30,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:06:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:30,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:06:30,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:06:30,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:06:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:06:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:06:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 75 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:06:30,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762165987] [2020-10-26 19:06:30,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:30,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:06:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301937015] [2020-10-26 19:06:30,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:06:30,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:06:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:06:30,692 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:06:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:31,383 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:06:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:06:31,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:06:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:31,385 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:06:31,385 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:06:31,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:06:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:06:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:06:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:06:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:06:31,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:06:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:31,394 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:06:31,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:06:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:06:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:06:31,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:31,395 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:31,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:06:31,396 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1364974033, now seen corresponding path program 6 times [2020-10-26 19:06:31,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:31,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618723781] [2020-10-26 19:06:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:31,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:36,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:36,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:36,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:06:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:36,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:06:36,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:06:36,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:36,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:06:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:36,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:06:36,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 19:06:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:36,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:06:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:36,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:36,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:36,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:06:36,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 19:06:36,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:36,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 108 proven. 252 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:06:36,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618723781] [2020-10-26 19:06:36,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:36,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:06:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273271920] [2020-10-26 19:06:37,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:06:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:06:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:06:37,002 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:06:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:37,864 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:06:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:06:37,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:06:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:37,866 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:06:37,866 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:06:37,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:06:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:06:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:06:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:06:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:06:37,875 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:06:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:37,875 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:06:37,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:06:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:06:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:06:37,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:37,877 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:37,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:06:37,878 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 909335185, now seen corresponding path program 7 times [2020-10-26 19:06:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:37,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328307516] [2020-10-26 19:06:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:42,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:42,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:06:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:43,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:06:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 19:06:43,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:06:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:06:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:06:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:06:43,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:06:43,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:06:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:06:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:06:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:43,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:43,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:06:43,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:43,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:06:43,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:43,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:06:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:06:43,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 147 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:06:43,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328307516] [2020-10-26 19:06:43,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:43,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:06:43,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110536578] [2020-10-26 19:06:43,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:06:43,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:43,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:06:43,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:06:43,508 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:06:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:44,374 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:06:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:06:44,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:06:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:44,376 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:06:44,376 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:06:44,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:06:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:06:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:06:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:06:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:06:44,402 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:06:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:44,403 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:06:44,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:06:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:06:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:06:44,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:44,407 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:44,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:06:44,407 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:44,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1569617583, now seen corresponding path program 8 times [2020-10-26 19:06:44,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:44,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88940078] [2020-10-26 19:06:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:44,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:44,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:49,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:06:49,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:49,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:06:49,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:06:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:06:49,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:49,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:49,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:49,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:49,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:49,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:49,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:49,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:49,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:49,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:06:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:49,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:49,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:06:49,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:49,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 19:06:49,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:06:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:06:49,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:49,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:06:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:50,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:50,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:06:50,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 19:06:50,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:06:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:06:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:50,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:06:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:50,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:50,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:50,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:50,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:06:50,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 19:06:50,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:06:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:06:50,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 192 proven. 448 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:06:50,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88940078] [2020-10-26 19:06:50,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:50,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:06:50,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465852309] [2020-10-26 19:06:50,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:06:50,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:06:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:06:50,137 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:06:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:51,256 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:06:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:06:51,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:06:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:51,258 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:06:51,258 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:06:51,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:06:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:06:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:06:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:06:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:06:51,268 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:06:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:51,268 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:06:51,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:06:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:06:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:06:51,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:51,270 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:51,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:06:51,270 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:51,271 INFO L82 PathProgramCache]: Analyzing trace with hash 375219729, now seen corresponding path program 9 times [2020-10-26 19:06:51,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:51,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020483527] [2020-10-26 19:06:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:51,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:06:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:06:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:06:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:06:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:56,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:56,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:06:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:06:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:56,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:06:56,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:06:56,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:06:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:56,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:57,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:06:57,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:57,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:06:57,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:57,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:06:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:57,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:57,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:06:57,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:57,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 19:06:57,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:57,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:06:57,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:57,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:06:57,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 243 proven. 567 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 19:06:57,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020483527] [2020-10-26 19:06:57,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:57,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:06:57,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655351493] [2020-10-26 19:06:57,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:06:57,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:06:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:06:57,081 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:06:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:58,282 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:06:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:06:58,283 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:06:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:58,284 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:06:58,284 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:06:58,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:06:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:06:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:06:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:06:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:06:58,294 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:06:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:58,294 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:06:58,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:06:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:06:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:06:58,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:58,295 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:58,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:06:58,296 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 22933713, now seen corresponding path program 10 times [2020-10-26 19:06:58,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:58,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489790509] [2020-10-26 19:06:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:58,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:03,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:07:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:03,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:03,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:03,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:03,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:03,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:03,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:03,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:03,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:07:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:03,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:03,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:07:03,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:07:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:07:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:07:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:07:04,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:07:04,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:07:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:04,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:07:04,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:04,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:07:04,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:04,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:04,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:07:04,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 300 proven. 700 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:07:04,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489790509] [2020-10-26 19:07:04,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:04,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:07:04,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909243272] [2020-10-26 19:07:04,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:07:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:04,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:07:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:07:04,367 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:07:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:05,554 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:07:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:07:05,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:07:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:05,556 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:07:05,556 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:07:05,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:07:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:07:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:07:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:07:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:07:05,567 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:07:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:05,568 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:07:05,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:07:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:07:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:07:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:05,570 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:05,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:07:05,570 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:05,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1309005423, now seen corresponding path program 11 times [2020-10-26 19:07:05,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:05,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121723407] [2020-10-26 19:07:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:05,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:07:10,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:10,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:07:10,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:07:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:07:10,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:10,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:07:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:07:10,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:07:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:11,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:11,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:11,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:07:11,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:11,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:07:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:11,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:11,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:11,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:07:11,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:11,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 19:07:11,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:07:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:07:11,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 363 proven. 847 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:07:11,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121723407] [2020-10-26 19:07:11,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:11,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:07:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403716396] [2020-10-26 19:07:11,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:07:11,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:07:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:07:11,512 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:07:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:12,939 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:07:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:07:12,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:07:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:12,942 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:07:12,942 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:07:12,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:07:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:07:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:07:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:07:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:07:12,963 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:07:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:12,964 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:07:12,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:07:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:07:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:07:12,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:12,971 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:12,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:07:12,971 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1171853393, now seen corresponding path program 12 times [2020-10-26 19:07:12,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:12,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518745976] [2020-10-26 19:07:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:13,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:18,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:07:18,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:07:18,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:18,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:18,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:07:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:18,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:07:18,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:07:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:18,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:07:18,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:18,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:07:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:19,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:19,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:07:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 432 proven. 1008 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 19:07:19,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518745976] [2020-10-26 19:07:19,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:19,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:07:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223970482] [2020-10-26 19:07:19,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:07:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:07:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:07:19,091 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:07:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:20,692 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:07:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:07:20,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:07:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:20,694 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:07:20,694 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:07:20,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:07:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:07:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:07:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:07:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:07:20,704 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:07:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:20,704 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:07:20,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:07:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:07:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:07:20,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:20,706 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:20,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:07:20,706 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1715362543, now seen corresponding path program 13 times [2020-10-26 19:07:20,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:20,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899179610] [2020-10-26 19:07:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:20,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:25,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:07:25,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:26,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:26,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:26,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:26,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:07:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:07:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:26,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:07:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:07:26,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:26,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:07:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:26,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:07:26,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:26,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 19:07:26,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:07:26,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:26,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:07:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 507 proven. 1183 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:07:26,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899179610] [2020-10-26 19:07:26,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:26,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:07:26,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408753012] [2020-10-26 19:07:26,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:07:26,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:26,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:07:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:07:26,899 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:07:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:28,621 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:07:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:07:28,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:07:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:28,623 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:07:28,623 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:07:28,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:07:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:07:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:07:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:07:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:07:28,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:07:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:28,633 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:07:28,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:07:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:07:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:07:28,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:28,635 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:28,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:07:28,635 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash 966453201, now seen corresponding path program 14 times [2020-10-26 19:07:28,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:28,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319255909] [2020-10-26 19:07:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:28,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:28,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:33,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:07:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:33,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:07:33,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:34,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:34,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:34,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:34,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:34,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:34,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:34,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:34,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:34,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:34,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:07:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:34,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:07:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:07:34,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:34,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:07:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:34,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:07:34,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 19:07:34,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:07:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:07:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:07:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:34,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:07:34,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:34,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 19:07:34,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:34,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:07:34,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:34,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:07:34,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 588 proven. 1372 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 19:07:35,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319255909] [2020-10-26 19:07:35,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:35,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:07:35,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448138023] [2020-10-26 19:07:35,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:07:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:07:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:07:35,030 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:07:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:36,920 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:07:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:07:36,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:07:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:36,923 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:07:36,923 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:07:36,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:07:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:07:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:07:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:07:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:07:36,931 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:07:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:36,931 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:07:36,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:07:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:07:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:07:36,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:36,933 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:36,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:07:36,933 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:36,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1349245073, now seen corresponding path program 15 times [2020-10-26 19:07:36,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:36,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994601009] [2020-10-26 19:07:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:36,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:37,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:42,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:42,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:42,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:42,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:42,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:07:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:42,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:42,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:43,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:07:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:43,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:43,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:07:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:43,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:07:43,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:43,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:07:43,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:07:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:43,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 675 proven. 1575 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:07:43,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994601009] [2020-10-26 19:07:43,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:43,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:07:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353349726] [2020-10-26 19:07:43,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:07:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:07:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:07:43,525 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:07:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:45,601 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:07:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:07:45,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:07:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:45,602 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:07:45,603 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:07:45,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:07:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:07:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:07:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:07:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:07:45,618 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:07:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:45,619 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:07:45,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:07:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:07:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:07:45,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:45,621 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:45,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:07:45,621 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1738836143, now seen corresponding path program 16 times [2020-10-26 19:07:45,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:45,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702779488] [2020-10-26 19:07:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:45,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:45,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:50,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:50,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:07:50,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:07:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:51,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:51,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:51,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:51,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:51,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:07:51,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:51,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:51,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:51,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:51,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:51,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:07:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:51,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:51,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:07:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:52,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:07:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:52,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:52,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:52,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:07:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:52,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:07:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:52,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:52,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:07:52,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:07:52,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:07:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:07:52,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 768 proven. 1792 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 19:07:52,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702779488] [2020-10-26 19:07:52,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:52,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:07:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263367758] [2020-10-26 19:07:52,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:07:52,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:07:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:07:52,376 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:07:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:54,303 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:07:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:07:54,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:07:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:54,305 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:07:54,306 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:07:54,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:07:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:07:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:07:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:07:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:07:54,316 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:07:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:54,316 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:07:54,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:07:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:07:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:07:54,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:54,319 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:54,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:07:54,319 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1253098513, now seen corresponding path program 17 times [2020-10-26 19:07:54,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:54,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011320439] [2020-10-26 19:07:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:59,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:07:59,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:07:59,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:59,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:59,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:07:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:59,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:59,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:07:59,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:07:59,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 19:07:59,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:07:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:07:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:07:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:08:00,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:08:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:08:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:08:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:08:01,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 867 proven. 2023 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:08:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011320439] [2020-10-26 19:08:01,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:01,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:08:01,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390497582] [2020-10-26 19:08:01,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:08:01,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:08:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:08:01,149 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:08:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:03,485 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:08:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:08:03,486 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:08:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:03,488 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:08:03,488 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:08:03,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:08:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:08:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:08:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:08:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:08:03,496 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:08:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:03,497 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:08:03,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:08:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:08:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:08:03,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:03,498 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:03,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:08:03,499 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash 265469649, now seen corresponding path program 18 times [2020-10-26 19:08:03,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:03,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227732300] [2020-10-26 19:08:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:03,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:08,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:08,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:08:08,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:08:08,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:08:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:08:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:09,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:09,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:09,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:09,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:09,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:09,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:08:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:09,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:08:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:08:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:10,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:10,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:08:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:10,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:08:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:08:10,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 972 proven. 2268 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-26 19:08:10,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227732300] [2020-10-26 19:08:10,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:10,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:08:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362322542] [2020-10-26 19:08:10,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:08:10,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:08:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:08:10,464 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:08:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:13,024 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:08:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:08:13,025 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:08:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:13,026 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:08:13,027 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:08:13,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:08:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:08:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:08:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:08:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:08:13,036 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:08:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:13,036 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:08:13,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:08:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:08:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:08:13,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:13,038 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:13,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:08:13,038 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash -280467567, now seen corresponding path program 19 times [2020-10-26 19:08:13,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:13,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381913662] [2020-10-26 19:08:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:13,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:13,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:18,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:08:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:18,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:18,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:18,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:18,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:18,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:08:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:18,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:18,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:18,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:18,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:08:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:08:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:19,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:19,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:19,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:08:19,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:19,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 19:08:19,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:08:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:08:19,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:08:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:08:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 1083 proven. 2527 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 19:08:20,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381913662] [2020-10-26 19:08:20,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:20,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:08:20,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346068749] [2020-10-26 19:08:20,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:08:20,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:08:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:08:20,151 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:08:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:22,824 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:08:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:08:22,825 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:08:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:22,827 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:08:22,827 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:08:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:08:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:08:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:08:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:08:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:08:22,836 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:08:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:22,837 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:08:22,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:08:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:08:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:08:22,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:22,839 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:22,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:08:22,839 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1069071953, now seen corresponding path program 20 times [2020-10-26 19:08:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795813966] [2020-10-26 19:08:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:22,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:22,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:27,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:08:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:28,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:28,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:08:28,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:28,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:08:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:28,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:28,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:28,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:08:28,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:28,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:08:28,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:28,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:08:28,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:28,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:08:28,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:08:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:30,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:30,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:08:30,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:08:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:30,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:30,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:30,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:08:30,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:30,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:08:30,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:30,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:08:30,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:30,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:08:30,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4135 backedges. 1200 proven. 2800 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:08:30,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795813966] [2020-10-26 19:08:30,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:30,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:08:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982994124] [2020-10-26 19:08:30,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:08:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:08:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:08:30,164 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:08:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:33,208 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:08:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:08:33,213 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:08:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:33,214 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:08:33,214 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:08:33,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:08:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:08:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:08:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:08:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:08:33,223 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:08:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:33,224 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:08:33,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:08:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:08:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:08:33,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:33,226 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:33,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:08:33,226 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:33,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1762999535, now seen corresponding path program 21 times [2020-10-26 19:08:33,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:33,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782772445] [2020-10-26 19:08:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:38,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:08:38,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:39,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:39,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:39,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:08:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:39,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:08:39,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:40,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:08:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:08:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:08:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:40,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:08:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:40,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:40,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:08:40,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 19:08:40,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:08:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:08:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:08:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4551 backedges. 1323 proven. 3087 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:08:40,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782772445] [2020-10-26 19:08:40,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:40,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:08:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034244776] [2020-10-26 19:08:40,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:08:40,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:08:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:08:40,980 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:08:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:43,914 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:08:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:08:43,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:08:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:43,917 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:08:43,917 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:08:43,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:08:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:08:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:08:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:08:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:08:43,925 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:08:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:43,925 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:08:43,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:08:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:08:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:08:43,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:43,927 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:43,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:08:43,927 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1178241583, now seen corresponding path program 22 times [2020-10-26 19:08:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:43,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494475550] [2020-10-26 19:08:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:43,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:48,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:48,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:08:48,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:08:48,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:08:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:08:48,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:49,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:49,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:49,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:08:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:49,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:08:49,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 19:08:49,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:08:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:08:49,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:51,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:08:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:51,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:51,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:51,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:08:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:08:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:51,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:08:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:51,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:51,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:51,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:08:51,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 19:08:51,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:08:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:08:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:08:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 1452 proven. 3388 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:08:51,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494475550] [2020-10-26 19:08:51,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:51,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:08:51,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025381540] [2020-10-26 19:08:51,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:08:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:08:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:08:51,763 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:08:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:54,842 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:08:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:08:54,842 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:08:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:54,844 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:08:54,844 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:08:54,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:08:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:08:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:08:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:08:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:08:54,855 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:08:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:54,856 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:08:54,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:08:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:08:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:08:54,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:54,858 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:54,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:08:54,858 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1940924783, now seen corresponding path program 23 times [2020-10-26 19:08:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932227536] [2020-10-26 19:08:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:54,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:55,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:55,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:59,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:08:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:08:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:08:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:00,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:00,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:00,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:09:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:00,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:00,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:09:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:00,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:09:00,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:09:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:09:02,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:02,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:09:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:02,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:09:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5443 backedges. 1587 proven. 3703 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:09:02,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932227536] [2020-10-26 19:09:02,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:02,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:09:02,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804981222] [2020-10-26 19:09:02,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:09:02,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:09:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:09:02,929 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:09:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:06,491 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:09:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:09:06,492 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:09:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:06,494 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:09:06,494 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:09:06,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:09:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:09:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:09:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:09:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:09:06,504 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:09:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:06,504 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:09:06,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:09:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:09:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:09:06,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:06,506 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:09:06,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:09:06,506 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash 28370257, now seen corresponding path program 24 times [2020-10-26 19:09:06,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:06,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80658214] [2020-10-26 19:09:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:06,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:09:11,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:09:11,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:09:11,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:12,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:12,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:09:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:12,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:09:12,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:12,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:09:12,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:14,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:09:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:14,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:14,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:09:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:09:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:14,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:09:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:09:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5919 backedges. 1728 proven. 4032 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-26 19:09:14,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80658214] [2020-10-26 19:09:14,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:14,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:09:14,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824411799] [2020-10-26 19:09:14,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:09:14,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:09:14,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:09:14,761 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:09:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:18,333 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:09:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:09:18,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:09:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:18,335 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:09:18,335 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:09:18,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:09:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:09:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:09:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:09:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:09:18,348 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:09:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:18,349 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:09:18,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:09:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:09:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:09:18,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:18,351 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:09:18,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:09:18,352 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash 204448273, now seen corresponding path program 25 times [2020-10-26 19:09:18,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:18,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387974698] [2020-10-26 19:09:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:18,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:23,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:23,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:09:23,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:09:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:24,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:24,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:24,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:24,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:09:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:24,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:24,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:24,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:24,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:09:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:26,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:09:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:26,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:26,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:26,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:26,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:09:26,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 19:09:26,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:09:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:09:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:26,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:26,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:09:26,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:26,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 19:09:26,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:09:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:26,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:09:26,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 1875 proven. 4375 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:09:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387974698] [2020-10-26 19:09:26,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:26,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:09:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694099253] [2020-10-26 19:09:26,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:09:26,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:26,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:09:26,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:09:26,671 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:09:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:30,885 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:09:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:09:30,886 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:09:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:30,887 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:09:30,887 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:09:30,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:09:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:09:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:09:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:09:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:09:30,897 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:09:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:30,898 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:09:30,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:09:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:09:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:09:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:30,900 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:09:30,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:09:30,900 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:30,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034223, now seen corresponding path program 26 times [2020-10-26 19:09:30,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:30,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863906769] [2020-10-26 19:09:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:30,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:30,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:31,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:35,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:09:35,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:37,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:37,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:37,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:09:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:37,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:37,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:37,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:09:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:39,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:09:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:39,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:39,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:39,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:09:39,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 19:09:39,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:09:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:09:39,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:39,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:09:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:39,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:09:39,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6931 backedges. 2028 proven. 4732 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-26 19:09:39,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863906769] [2020-10-26 19:09:39,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:39,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:09:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709395568] [2020-10-26 19:09:39,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:09:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:09:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:09:39,714 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states.