/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/bor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:02:12,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:02:12,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:02:12,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:02:12,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:02:12,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:02:12,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:02:12,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:02:12,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:02:12,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:02:12,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:02:12,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:02:12,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:02:12,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:02:12,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:02:12,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:02:12,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:02:12,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:02:12,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:02:12,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:02:12,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:02:12,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:02:12,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:02:12,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:02:12,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:02:12,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:02:12,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:02:12,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:02:12,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:02:12,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:02:12,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:02:12,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:02:12,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:02:12,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:02:12,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:02:12,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:02:12,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:02:12,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:02:12,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:02:12,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:02:12,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:02:12,750 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 19:02:12,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:02:12,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:02:12,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:02:12,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:02:12,824 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:02:12,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:02:12,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:02:12,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:02:12,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:02:12,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:02:12,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:02:12,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:02:12,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:02:12,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:02:12,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:02:12,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:02:12,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:02:12,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:02:12,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:02:12,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:02:12,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:02:12,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:12,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:02:12,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:02:12,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:02:12,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:02:12,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:02:12,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:02:12,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:02:12,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:02:13,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:02:13,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:02:13,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:02:13,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:02:13,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:02:13,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor4.i [2020-10-26 19:02:13,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/366b41c13/7e7e2a69ea1c493cb845d44ac322c3b9/FLAG380f1b3d9 [2020-10-26 19:02:14,220 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:02:14,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bor4.i [2020-10-26 19:02:14,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/366b41c13/7e7e2a69ea1c493cb845d44ac322c3b9/FLAG380f1b3d9 [2020-10-26 19:02:14,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/366b41c13/7e7e2a69ea1c493cb845d44ac322c3b9 [2020-10-26 19:02:14,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:02:14,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:02:14,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:14,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:02:14,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:02:14,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aecdd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14, skipping insertion in model container [2020-10-26 19:02:14,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:02:14,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:02:14,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:14,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:02:14,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:14,918 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:02:14,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14 WrapperNode [2020-10-26 19:02:14,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:14,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:02:14,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:02:14,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:02:14,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:14,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:15,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:15,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (1/1) ... [2020-10-26 19:02:15,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:02:15,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:02:15,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:02:15,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:02:15,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (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 19:02:15,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:02:15,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:02:15,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:02:15,136 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2020-10-26 19:02:15,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:02:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:02:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:02:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:02:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:02:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:02:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:02:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:02:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2020-10-26 19:02:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:02:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:02:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:02:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:02:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:02:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:02:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:02:15,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:02:15,605 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:02:15,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:15 BoogieIcfgContainer [2020-10-26 19:02:15,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:02:15,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:02:15,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:02:15,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:02:15,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:02:14" (1/3) ... [2020-10-26 19:02:15,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539e928d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:15, skipping insertion in model container [2020-10-26 19:02:15,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:14" (2/3) ... [2020-10-26 19:02:15,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539e928d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:15, skipping insertion in model container [2020-10-26 19:02:15,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:15" (3/3) ... [2020-10-26 19:02:15,617 INFO L111 eAbstractionObserver]: Analyzing ICFG bor4.i [2020-10-26 19:02:15,630 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:02:15,635 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:02:15,653 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:02:15,683 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:02:15,683 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:02:15,684 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:02:15,684 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:02:15,684 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:02:15,684 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:02:15,684 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:02:15,685 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:02:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:02:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:15,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:15,714 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 19:02:15,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1900796497, now seen corresponding path program 1 times [2020-10-26 19:02:15,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:15,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313766224] [2020-10-26 19:02:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:16,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:16,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-26 19:02:16,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:02:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:16,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:16,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:02:16,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:16,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:02:16,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:16,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:16,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 19:02:16,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:16,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:16,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:16,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:16,893 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 19:02:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313766224] [2020-10-26 19:02:16,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:16,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:02:16,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083254502] [2020-10-26 19:02:16,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:02:16,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:02:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:16,926 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:02:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:17,057 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:02:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:02:17,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:02:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:17,069 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:02:17,069 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:02:17,073 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 19:02:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:02:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:02:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:02:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:02:17,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:02:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:17,127 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:02:17,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:02:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:02:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:17,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:17,130 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 19:02:17,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:02:17,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1640105647, now seen corresponding path program 1 times [2020-10-26 19:02:17,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:17,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157246731] [2020-10-26 19:02:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:18,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:18,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-26 19:02:18,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:18,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:18,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:18,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:18,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:18,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:18,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:18,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:02:18,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:18,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:18,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:18,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:18,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:18,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:18,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:18,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:18,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:18,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:18,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:18,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:18,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:18,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:18,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:02:18,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:18,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:18,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:18,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:18,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:18,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:18,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:18,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:18,966 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 19:02:18,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157246731] [2020-10-26 19:02:18,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:02:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919942496] [2020-10-26 19:02:18,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:02:18,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:02:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:02:18,974 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:02:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:19,258 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:02:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:02:19,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:02:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:19,261 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:02:19,261 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:02:19,263 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 19:02:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:02:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:02:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:02:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:02:19,287 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:02:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:19,288 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:02:19,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:02:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:02:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:02:19,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:19,291 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 19:02:19,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:02:19,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1537402351, now seen corresponding path program 1 times [2020-10-26 19:02:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:19,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326367987] [2020-10-26 19:02:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:19,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:19,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:02:24,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:02:24,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:24,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:02:24,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:24,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:02:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:24,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:24,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:02:24,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:24,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:24,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:24,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:02:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:24,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:24,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:24,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:02:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:24,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:24,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:02:24,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:24,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:02:24,531 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 19:02:24,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326367987] [2020-10-26 19:02:24,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:24,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:02:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722549613] [2020-10-26 19:02:24,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:02:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:02:24,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:02:24,537 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:02:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:24,817 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:02:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:02:24,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:02:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:24,819 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:02:24,819 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:02:24,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:02:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:02:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:02:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:02:24,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:02:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:24,830 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:02:24,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:02:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:02:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:02:24,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:24,832 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 19:02:24,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:02:24,832 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1486624559, now seen corresponding path program 2 times [2020-10-26 19:02:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:24,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660716673] [2020-10-26 19:02:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:29,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:02:29,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:02:29,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:29,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:29,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:29,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:29,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:29,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:29,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:02:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:30,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:30,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:30,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 19:02:30,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:30,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:30,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:02:30,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:02:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:30,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:30,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:02:30,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:30,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:02:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:30,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:30,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:30,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:30,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:30,145 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 19:02:30,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660716673] [2020-10-26 19:02:30,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:30,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:02:30,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63868641] [2020-10-26 19:02:30,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:02:30,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:02:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:30,151 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:02:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:30,478 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:02:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:02:30,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:02:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:30,480 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:02:30,481 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:02:30,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:02:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:02:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:02:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:02:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:02:30,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:02:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:30,498 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:02:30,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:02:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:02:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:02:30,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:30,502 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 19:02:30,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:02:30,502 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1972987281, now seen corresponding path program 3 times [2020-10-26 19:02:30,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:30,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267416161] [2020-10-26 19:02:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:35,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:02:35,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:02:35,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:35,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:35,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:35,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:35,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:35,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:02:35,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:35,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:35,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:35,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:02:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:35,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:35,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:35,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 19:02:35,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:35,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:35,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:35,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:02:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:35,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:35,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:35,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:35,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:35,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:35,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:35,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:02:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:35,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:35,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:35,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:35,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:35,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:35,817 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 19:02:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267416161] [2020-10-26 19:02:35,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:35,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:02:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002367805] [2020-10-26 19:02:35,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:02:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:02:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:02:35,822 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:02:36,193 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-26 19:02:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:36,306 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:02:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:02:36,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:02:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:36,310 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:02:36,310 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:02:36,311 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 19:02:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:02:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:02:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:02:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:02:36,329 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:02:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:36,330 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:02:36,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:02:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:02:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:02:36,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:36,333 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 19:02:36,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:02:36,334 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:36,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1550094417, now seen corresponding path program 4 times [2020-10-26 19:02:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:36,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981154220] [2020-10-26 19:02:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:36,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:36,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:36,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:41,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:02:41,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:41,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:41,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:41,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:41,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:41,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:41,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:02:41,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:41,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:41,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:02:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:41,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:41,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:02:41,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:41,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:02:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:41,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:41,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:41,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:02:41,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:41,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:02:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:41,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:41,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:41,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:02:41,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:41,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:41,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:41,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:41,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:41,686 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 19:02:41,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981154220] [2020-10-26 19:02:41,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:41,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:02:41,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221490674] [2020-10-26 19:02:41,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:02:41,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:02:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:02:41,691 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:02:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:42,029 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:02:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:02:42,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:02:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:42,031 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:02:42,031 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:02:42,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:02:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:02:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:02:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:02:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:02:42,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:02:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:42,040 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:02:42,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:02:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:02:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:02:42,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:42,041 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 19:02:42,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:02:42,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash 407660817, now seen corresponding path program 5 times [2020-10-26 19:02:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526380691] [2020-10-26 19:02:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:46,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:47,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:02:47,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:47,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:47,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:47,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:47,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:47,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:47,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:47,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:47,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:47,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:47,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:47,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:47,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:47,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:47,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:47,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:02:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:47,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:47,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:47,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:02:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:47,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:47,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:47,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 19:02:47,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:47,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:47,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:47,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:47,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:47,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:02:47,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:47,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:47,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:47,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:47,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:47,400 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 19:02:47,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526380691] [2020-10-26 19:02:47,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:47,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:02:47,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710630519] [2020-10-26 19:02:47,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:02:47,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:02:47,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:47,404 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:02:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:47,833 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:02:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:02:47,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:02:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:47,835 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:02:47,835 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:02:47,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:02:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:02:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:02:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:02:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:02:47,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:02:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:47,852 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:02:47,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:02:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:02:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:02:47,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:47,854 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 19:02:47,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:02:47,855 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash -990384175, now seen corresponding path program 6 times [2020-10-26 19:02:47,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:47,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713718803] [2020-10-26 19:02:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:52,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:52,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:52,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:53,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:53,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:53,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:53,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:53,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:02:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:53,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:53,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:02:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:53,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:53,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:53,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:53,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:02:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:53,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:53,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:53,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:53,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:02:53,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:53,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:53,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:53,262 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 19:02:53,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713718803] [2020-10-26 19:02:53,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:53,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:02:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983621930] [2020-10-26 19:02:53,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:02:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:02:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:02:53,265 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:02:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:53,735 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:02:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:02:53,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:02:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:53,737 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:02:53,737 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:02:53,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:02:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:02:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:02:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:02:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:02:53,753 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:02:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:53,754 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:02:53,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:02:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:02:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:02:53,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:53,760 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 19:02:53,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:02:53,760 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash -852613999, now seen corresponding path program 7 times [2020-10-26 19:02:53,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:53,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479756204] [2020-10-26 19:02:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:53,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:58,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:58,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:02:58,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:02:58,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:58,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:58,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:58,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:58,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:02:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:59,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:02:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:59,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:59,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:59,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:02:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:59,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:59,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:59,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 19:02:59,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:59,250 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 19:02:59,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479756204] [2020-10-26 19:02:59,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:59,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:02:59,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433433931] [2020-10-26 19:02:59,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:02:59,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:02:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:02:59,253 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:02:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:59,807 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:02:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:02:59,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:02:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:59,808 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:02:59,808 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:02:59,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:02:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:02:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:02:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:02:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:02:59,826 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:02:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:59,827 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:02:59,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:02:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:02:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:02:59,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:59,831 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 19:02:59,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:02:59,831 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -623507631, now seen corresponding path program 8 times [2020-10-26 19:02:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:59,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837595071] [2020-10-26 19:02:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:04,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:04,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:03:04,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:04,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:03:04,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:04,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:04,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:04,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:04,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:04,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:04,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:04,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:04,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:04,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:04,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:03:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:04,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:05,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:05,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:03:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:03:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:05,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:05,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:05,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:05,284 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 19:03:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837595071] [2020-10-26 19:03:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:05,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:03:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748428507] [2020-10-26 19:03:05,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:03:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:03:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:03:05,287 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:03:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:05,973 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:03:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:03:05,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:03:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:05,975 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:03:05,975 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:03:05,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:03:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:03:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:03:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:03:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:03:05,984 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:03:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:05,985 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:03:05,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:03:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:03:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:03:05,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:05,986 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 19:03:05,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:03:05,987 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -956917743, now seen corresponding path program 9 times [2020-10-26 19:03:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:05,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818483566] [2020-10-26 19:03:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:11,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:11,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:11,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:11,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:11,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:11,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:03:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:11,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:11,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:11,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:03:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:11,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:11,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:03:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:11,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:11,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:11,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:11,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:03:11,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:11,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:11,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:11,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:11,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:11,529 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 19:03:11,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818483566] [2020-10-26 19:03:11,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:11,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:03:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427126890] [2020-10-26 19:03:11,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:03:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:03:11,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:03:11,532 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:03:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:12,266 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:03:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:03:12,267 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:03:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:12,268 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:03:12,268 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:03:12,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:03:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:03:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:03:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:03:12,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:03:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:12,279 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:03:12,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:03:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:03:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:03:12,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:12,280 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 19:03:12,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:03:12,281 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:12,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1984506159, now seen corresponding path program 10 times [2020-10-26 19:03:12,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:12,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277490648] [2020-10-26 19:03:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:12,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:17,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:03:17,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:03:17,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:17,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:17,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:17,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:17,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:03:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:17,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:03:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:17,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:17,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:17,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:17,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:03:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:17,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:18,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 19:03:18,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:18,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:18,052 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 19:03:18,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277490648] [2020-10-26 19:03:18,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:18,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:03:18,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604693752] [2020-10-26 19:03:18,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:03:18,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:03:18,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:03:18,056 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:03:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:18,770 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:03:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:03:18,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:03:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:18,772 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:03:18,772 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:03:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:03:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:03:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:03:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:03:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:03:18,783 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:03:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:18,783 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:03:18,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:03:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:03:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:03:18,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:18,785 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 19:03:18,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:03:18,785 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:18,786 INFO L82 PathProgramCache]: Analyzing trace with hash 710787985, now seen corresponding path program 11 times [2020-10-26 19:03:18,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:18,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977219817] [2020-10-26 19:03:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:18,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:23,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:23,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:23,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:23,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:03:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:23,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:24,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:24,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:24,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 19:03:24,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:24,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:24,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:03:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:24,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:24,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:24,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:03:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:24,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:24,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:24,522 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 19:03:24,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977219817] [2020-10-26 19:03:24,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:24,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:03:24,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948072791] [2020-10-26 19:03:24,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:03:24,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:03:24,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:24,525 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:03:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:25,394 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:03:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:03:25,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:03:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:25,396 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:03:25,396 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:03:25,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:03:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:03:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:03:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:03:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:03:25,405 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:03:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:25,406 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:03:25,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:03:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:03:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:03:25,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:25,407 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 19:03:25,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:03:25,408 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1353556399, now seen corresponding path program 12 times [2020-10-26 19:03:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:25,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735862953] [2020-10-26 19:03:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:25,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:30,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:30,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:03:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:30,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:30,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:31,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:03:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:31,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:31,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:31,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:31,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:03:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:31,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:31,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:31,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 19:03:31,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:31,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:31,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:31,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:31,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:31,181 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 19:03:31,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735862953] [2020-10-26 19:03:31,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:31,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:03:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747263050] [2020-10-26 19:03:31,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:03:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:31,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:03:31,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:03:31,183 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:03:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:32,185 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:03:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:03:32,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:03:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:32,187 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:03:32,188 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:03:32,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:03:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:03:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:03:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:03:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:03:32,197 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:03:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:32,197 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:03:32,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:03:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:03:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:03:32,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:32,198 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 19:03:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:03:32,199 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 236693265, now seen corresponding path program 13 times [2020-10-26 19:03:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:32,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045336423] [2020-10-26 19:03:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:32,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:37,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:37,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:37,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:37,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:37,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:37,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:03:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:37,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:37,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:37,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:03:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:37,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:03:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:37,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:37,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:37,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:37,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:38,004 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 19:03:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045336423] [2020-10-26 19:03:38,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:38,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:03:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6310698] [2020-10-26 19:03:38,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:03:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:03:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:03:38,007 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:03:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:39,057 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:03:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:03:39,061 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:03:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:39,062 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:03:39,063 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:03:39,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:03:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:03:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:03:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:03:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:03:39,071 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:03:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:39,072 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:03:39,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:03:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:03:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:03:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:39,074 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 19:03:39,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:03:39,074 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 459316689, now seen corresponding path program 14 times [2020-10-26 19:03:39,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:39,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889237548] [2020-10-26 19:03:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:44,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:44,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:44,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:03:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:44,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:03:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:44,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:44,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:44,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:44,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 19:03:44,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:44,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:44,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:03:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:44,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:44,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:44,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:45,016 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 19:03:45,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889237548] [2020-10-26 19:03:45,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:45,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:03:45,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99156812] [2020-10-26 19:03:45,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:03:45,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:03:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:45,019 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:03:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:46,184 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:03:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:03:46,186 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:03:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:46,187 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:03:46,187 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:03:46,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:03:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:03:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:03:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:03:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:03:46,196 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:03:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:46,196 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:03:46,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:03:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:03:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:03:46,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:46,198 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 19:03:46,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:03:46,198 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2062041745, now seen corresponding path program 15 times [2020-10-26 19:03:46,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:46,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813178851] [2020-10-26 19:03:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:51,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:51,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:51,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:51,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:51,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:51,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:51,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:03:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:51,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:51,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:52,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:03:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:52,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:03:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:52,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:52,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:52,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:52,216 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 19:03:52,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813178851] [2020-10-26 19:03:52,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:52,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:03:52,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38531312] [2020-10-26 19:03:52,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:03:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:52,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:03:52,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:03:52,219 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:03:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:53,494 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:03:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:03:53,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:03:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:53,496 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:03:53,496 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:03:53,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:03:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:03:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:03:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:03:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:03:53,506 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:03:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:53,506 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:03:53,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:03:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:03:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:03:53,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:53,508 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 19:03:53,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:03:53,509 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1885760175, now seen corresponding path program 16 times [2020-10-26 19:03:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:53,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105900426] [2020-10-26 19:03:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:58,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:58,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:58,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:58,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:03:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:58,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:59,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:03:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:59,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:59,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 19:03:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:03:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:59,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:59,713 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 19:03:59,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105900426] [2020-10-26 19:03:59,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:59,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:03:59,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645440183] [2020-10-26 19:03:59,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:03:59,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:03:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:03:59,716 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:04:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:00,862 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:04:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:04:00,863 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:04:00,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:00,865 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:04:00,865 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:04:00,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:04:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:04:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:04:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:04:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:04:00,874 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:04:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:00,875 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:04:00,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:04:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:04:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:04:00,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:00,876 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 19:04:00,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:04:00,876 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1803261457, now seen corresponding path program 17 times [2020-10-26 19:04:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:00,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476294219] [2020-10-26 19:04:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:05,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:05,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:06,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:06,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:06,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:06,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:06,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:06,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:06,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:06,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:04:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:06,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:06,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:06,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 19:04:06,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:06,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:04:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:06,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:06,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:06,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:04:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:06,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:07,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:07,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:07,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 19:04:07,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:07,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:07,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:07,088 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 19:04:07,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476294219] [2020-10-26 19:04:07,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:07,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:04:07,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913836022] [2020-10-26 19:04:07,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:04:07,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:04:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:04:07,091 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:04:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:08,539 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:04:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:04:08,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:04:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:08,541 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:04:08,541 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:04:08,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:04:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:04:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:04:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:04:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:04:08,558 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:04:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:08,558 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:04:08,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:04:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:04:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:04:08,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:08,566 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 19:04:08,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:04:08,566 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1078639407, now seen corresponding path program 18 times [2020-10-26 19:04:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:08,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825879175] [2020-10-26 19:04:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:13,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:13,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:13,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:13,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:13,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:04:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:14,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:14,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:14,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:14,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 19:04:14,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:14,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:04:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:14,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:14,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:14,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:14,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:14,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:14,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:04:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:14,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:14,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:14,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:14,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 19:04:14,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:14,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:14,850 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 19:04:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825879175] [2020-10-26 19:04:14,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:14,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:04:14,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685810856] [2020-10-26 19:04:14,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:04:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:04:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:04:14,853 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:04:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:16,408 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:04:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:04:16,409 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:04:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:16,409 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:04:16,409 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:04:16,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:04:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:04:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:04:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:04:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:04:16,419 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:04:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:16,420 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:04:16,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:04:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:04:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:04:16,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:16,421 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 19:04:16,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:04:16,422 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash -863133295, now seen corresponding path program 19 times [2020-10-26 19:04:16,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:16,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898810947] [2020-10-26 19:04:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:21,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:21,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:21,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:04:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:21,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:21,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 19:04:21,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:04:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:22,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:22,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 19:04:22,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:22,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:04:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:22,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:22,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:22,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:22,986 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 19:04:22,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898810947] [2020-10-26 19:04:22,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:22,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:04:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511661256] [2020-10-26 19:04:22,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:04:22,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:04:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:04:22,989 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:04:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:24,571 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:04:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:04:24,571 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:04:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:24,573 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:04:24,573 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:04:24,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:04:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:04:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:04:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:04:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:04:24,584 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:04:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:24,584 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:04:24,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:04:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:04:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:04:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:24,586 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 19:04:24,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:04:24,586 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1366010961, now seen corresponding path program 20 times [2020-10-26 19:04:24,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:24,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162502742] [2020-10-26 19:04:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:29,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:30,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:30,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:30,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:04:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:30,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:30,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:30,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:30,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:04:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:31,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:04:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:31,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,154 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 19:04:31,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162502742] [2020-10-26 19:04:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:04:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753072028] [2020-10-26 19:04:31,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:04:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:04:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:04:31,157 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:04:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:32,972 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:04:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:04:32,976 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:04:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:32,977 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:04:32,977 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:04:32,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:04:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:04:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:04:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:04:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:04:32,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:04:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:32,994 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:04:32,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:04:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:04:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:04:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:32,996 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 19:04:32,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:04:32,996 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2094425361, now seen corresponding path program 21 times [2020-10-26 19:04:32,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:33,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357781489] [2020-10-26 19:04:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:33,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:33,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:33,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:38,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:38,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:38,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:38,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:04:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:38,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:38,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:38,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:39,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:04:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:39,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:04:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:39,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:39,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:39,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-26 19:04:39,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:04:39,846 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 19:04:39,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357781489] [2020-10-26 19:04:39,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:39,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:04:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719697242] [2020-10-26 19:04:39,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:04:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:04:39,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:04:39,849 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:04:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:41,602 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:04:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:04:41,603 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:04:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:41,605 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:04:41,605 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:04:41,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:04:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:04:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:04:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:04:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:04:41,615 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:04:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:41,615 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:04:41,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:04:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:04:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:04:41,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:41,617 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 19:04:41,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:04:41,617 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash -596325423, now seen corresponding path program 22 times [2020-10-26 19:04:41,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:41,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606167112] [2020-10-26 19:04:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:41,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:46,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:46,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:47,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:47,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:47,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:47,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:47,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:04:47,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:04:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:47,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:04:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:04:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:48,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:48,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,591 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 19:04:48,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606167112] [2020-10-26 19:04:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:04:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200136613] [2020-10-26 19:04:48,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:04:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:04:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:04:48,595 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:04:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:50,443 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:04:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:04:50,444 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:04:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:50,445 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:04:50,446 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:04:50,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:04:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:04:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:04:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:04:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:04:50,462 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:04:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:50,462 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:04:50,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:04:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:04:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:04:50,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:50,464 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 19:04:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:04:50,467 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1292755089, now seen corresponding path program 23 times [2020-10-26 19:04:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681951557] [2020-10-26 19:04:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:50,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:55,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:56,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:56,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:04:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:56,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:04:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:57,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:57,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 19:04:57,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:57,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:57,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:04:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:57,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 19:04:57,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:57,469 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 19:04:57,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681951557] [2020-10-26 19:04:57,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:57,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:04:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421598030] [2020-10-26 19:04:57,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:04:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:04:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:04:57,472 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:04:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:59,600 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:04:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:04:59,601 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:04:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:59,603 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:04:59,603 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:04:59,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:04:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:04:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:04:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:04:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:04:59,613 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:04:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:59,613 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:04:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:04:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:04:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:04:59,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:59,615 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 19:04:59,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:04:59,616 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash -360144047, now seen corresponding path program 24 times [2020-10-26 19:04:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:59,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403313034] [2020-10-26 19:04:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:59,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:04,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:04,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:05:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:05,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:05,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:05,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:05:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:05,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:05,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:06,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:05:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:06,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:06,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:05:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:06,708 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 19:05:06,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403313034] [2020-10-26 19:05:06,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:06,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:05:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622410864] [2020-10-26 19:05:06,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:05:06,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:05:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:05:06,710 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:05:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:08,886 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:05:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:05:08,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:05:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:08,888 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:05:08,888 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:05:08,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:05:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:05:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:05:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:05:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:05:08,904 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:05:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:08,904 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:05:08,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:05:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:05:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:05:08,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:08,906 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 19:05:08,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:05:08,907 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1305583, now seen corresponding path program 25 times [2020-10-26 19:05:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033541278] [2020-10-26 19:05:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:09,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:09,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:13,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:05:13,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:05:13,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:13,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:14,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:14,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:14,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:14,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:14,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:14,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:05:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:14,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:14,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:05:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:15,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:15,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:15,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:15,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:05:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:16,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:16,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:16,108 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 19:05:16,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033541278] [2020-10-26 19:05:16,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:16,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:05:16,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863407391] [2020-10-26 19:05:16,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:05:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:05:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:05:16,110 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:05:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:18,513 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:05:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:05:18,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:05:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:18,515 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:05:18,515 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:05:18,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:05:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:05:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:05:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:05:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:05:18,525 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:05:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:18,526 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:05:18,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:05:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:05:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:05:18,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:18,527 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 19:05:18,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:05:18,528 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash -144756015, now seen corresponding path program 26 times [2020-10-26 19:05:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:18,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256448676] [2020-10-26 19:05:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:23,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:23,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:05:23,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:23,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:24,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:24,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:24,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:24,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:24,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:24,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:24,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:05:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:24,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:25,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:05:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:05:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:25,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:25,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:25,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 19:05:25,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:25,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:25,911 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 19:05:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256448676] [2020-10-26 19:05:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:05:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281044132] [2020-10-26 19:05:25,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:05:25,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:05:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:05:25,914 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:05:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:28,452 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:05:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:05:28,453 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:05:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:28,455 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:05:28,455 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:05:28,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:05:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:05:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:05:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:05:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:05:28,465 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:05:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:28,465 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:05:28,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:05:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:05:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:05:28,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:28,467 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 27, 27, 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 19:05:28,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:05:28,467 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1244200849, now seen corresponding path program 27 times [2020-10-26 19:05:28,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:28,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197565309] [2020-10-26 19:05:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:28,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:33,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:34,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:34,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:34,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:34,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:34,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:05:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:34,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:05:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:35,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:35,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:35,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:05:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:35,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:05:35,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7467 backedges. 2187 proven. 5103 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:05:35,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197565309] [2020-10-26 19:05:35,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:35,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:05:35,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254904437] [2020-10-26 19:05:35,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:05:35,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:35,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:05:35,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:05:35,902 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:05:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:38,614 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:05:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:05:38,614 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:05:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:38,616 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:05:38,616 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:05:38,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:05:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:05:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:05:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:05:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:05:38,627 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:05:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:38,627 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:05:38,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:05:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:05:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:05:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:38,629 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 28, 28, 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 19:05:38,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:05:38,629 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1890613841, now seen corresponding path program 28 times [2020-10-26 19:05:38,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:38,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238446595] [2020-10-26 19:05:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:38,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:38,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:43,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:44,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:05:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:44,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-26 19:05:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:45,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:46,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:46,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-26 19:05:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:46,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:46,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8023 backedges. 2352 proven. 5488 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-26 19:05:46,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238446595] [2020-10-26 19:05:46,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:46,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:05:46,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340919140] [2020-10-26 19:05:46,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:05:46,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:05:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:05:46,324 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 61 states. [2020-10-26 19:05:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:49,012 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-26 19:05:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:05:49,012 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 258 [2020-10-26 19:05:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:49,014 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:05:49,014 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:05:49,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2020-10-26 19:05:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:05:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-26 19:05:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:05:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:05:49,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 258 [2020-10-26 19:05:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:05:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:05:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:05:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 19:05:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:49,026 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 29, 29, 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 19:05:49,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:05:49,026 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -763583727, now seen corresponding path program 29 times [2020-10-26 19:05:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441184297] [2020-10-26 19:05:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:49,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:54,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:54,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:54,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:54,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:54,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:54,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:54,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:54,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:54,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:54,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:54,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:05:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:55,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:55,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:55,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:55,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 19:05:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:56,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:56,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 19:05:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:56,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 19:05:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8599 backedges. 2523 proven. 5887 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-26 19:05:56,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441184297] [2020-10-26 19:05:56,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:56,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:05:56,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751239323] [2020-10-26 19:05:56,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:05:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:05:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:05:56,951 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 63 states. [2020-10-26 19:06:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:00,201 INFO L93 Difference]: Finished difference Result 225 states and 237 transitions. [2020-10-26 19:06:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:06:00,202 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 266 [2020-10-26 19:06:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:00,204 INFO L225 Difference]: With dead ends: 225 [2020-10-26 19:06:00,204 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:06:00,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2020-10-26 19:06:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:06:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-26 19:06:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:06:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-26 19:06:00,213 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 266 [2020-10-26 19:06:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:00,214 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-26 19:06:00,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:06:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-26 19:06:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 19:06:00,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:00,216 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 30, 30, 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 19:06:00,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:06:00,216 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1238074927, now seen corresponding path program 30 times [2020-10-26 19:06:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:00,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910819177] [2020-10-26 19:06:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:00,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking...