/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:59:21,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:59:21,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:59:21,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:59:21,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:59:21,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:59:21,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:59:21,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:59:21,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:59:21,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:59:21,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:59:21,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:59:21,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:59:21,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:59:21,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:59:21,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:59:21,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:59:21,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:59:21,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:59:21,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:59:21,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:59:21,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:59:21,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:59:21,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:59:21,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:59:21,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:59:21,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:59:21,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:59:21,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:59:21,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:59:21,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:59:21,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:59:21,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:59:21,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:59:21,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:59:21,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:59:21,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:59:21,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:59:21,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:59:21,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:59:21,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:59:21,762 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 [2020-10-14 17:59:21,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:59:21,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:59:21,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:59:21,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:59:21,816 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:59:21,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:59:21,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:59:21,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:59:21,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:59:21,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:59:21,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:59:21,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:59:21,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:59:21,818 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:59:21,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:59:21,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:59:21,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:59:21,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:59:21,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:59:21,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:59:21,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:59:21,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:21,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:59:21,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:59:21,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:59:21,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:59:21,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:59:21,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:59:21,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:59:21,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:59:22,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:59:22,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:59:22,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:59:22,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:59:22,144 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:59:22,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-14 17:59:22,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eb002c1/e6cc5bd00e1f4e819c6af2afcd7a586a/FLAGdf678a526 [2020-10-14 17:59:22,630 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:59:22,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-14 17:59:22,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eb002c1/e6cc5bd00e1f4e819c6af2afcd7a586a/FLAGdf678a526 [2020-10-14 17:59:23,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32eb002c1/e6cc5bd00e1f4e819c6af2afcd7a586a [2020-10-14 17:59:23,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:59:23,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:59:23,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:23,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:59:23,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:59:23,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2362c63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23, skipping insertion in model container [2020-10-14 17:59:23,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:59:23,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:59:23,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:23,298 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:59:23,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:23,340 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:59:23,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23 WrapperNode [2020-10-14 17:59:23,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:23,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:59:23,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:59:23,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:59:23,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (1/1) ... [2020-10-14 17:59:23,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:59:23,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:59:23,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:59:23,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:59:23,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (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 [2020-10-14 17:59:23,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:59:23,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:59:23,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:59:23,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:59:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:59:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:59:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:59:23,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:59:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:59:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:59:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:59:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:59:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:59:23,965 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:59:23,965 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 17:59:23,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:23 BoogieIcfgContainer [2020-10-14 17:59:23,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:59:23,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:59:23,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:59:23,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:59:23,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:59:23" (1/3) ... [2020-10-14 17:59:23,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4397531b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:23, skipping insertion in model container [2020-10-14 17:59:23,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:23" (2/3) ... [2020-10-14 17:59:23,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4397531b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:23, skipping insertion in model container [2020-10-14 17:59:23,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:23" (3/3) ... [2020-10-14 17:59:23,979 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-10-14 17:59:23,991 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:59:23,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:59:24,015 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:59:24,044 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:59:24,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:59:24,045 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:59:24,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:59:24,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:59:24,045 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:59:24,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:59:24,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:59:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-14 17:59:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:59:24,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:24,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:24,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2020-10-14 17:59:24,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:24,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100176829] [2020-10-14 17:59:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:24,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:24,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:24,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:24,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:59:24,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:59:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-14 17:59:24,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:24,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:59:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:59:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 17:59:25,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:25,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:25,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:25,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:25,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:25,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:25,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:25,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:59:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100176829] [2020-10-14 17:59:25,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:59:25,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:59:25,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213162584] [2020-10-14 17:59:25,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:59:25,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:25,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:59:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:59:25,142 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-14 17:59:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:25,297 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2020-10-14 17:59:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:59:25,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 17:59:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:25,307 INFO L225 Difference]: With dead ends: 60 [2020-10-14 17:59:25,307 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 17:59:25,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:59:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 17:59:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 17:59:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 17:59:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 17:59:25,353 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 17:59:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:25,354 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 17:59:25,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:59:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 17:59:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:59:25,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:25,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:25,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:59:25,356 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2020-10-14 17:59:25,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:25,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422967949] [2020-10-14 17:59:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:25,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:25,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:30,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:59:30,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:30,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:30,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:30,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:59:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 17:59:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:59:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:30,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:30,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:30,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:30,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:30,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:30,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:59:30,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422967949] [2020-10-14 17:59:30,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:30,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:59:30,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194833425] [2020-10-14 17:59:30,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:59:30,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:59:30,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:59:30,494 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 9 states. [2020-10-14 17:59:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:30,732 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-14 17:59:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:59:30,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 17:59:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:30,734 INFO L225 Difference]: With dead ends: 41 [2020-10-14 17:59:30,734 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 17:59:30,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:59:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 17:59:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-14 17:59:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 17:59:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 17:59:30,745 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2020-10-14 17:59:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:30,746 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 17:59:30,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:59:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 17:59:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:59:30,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:30,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:30,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:59:30,748 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1175041461, now seen corresponding path program 1 times [2020-10-14 17:59:30,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:30,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971767914] [2020-10-14 17:59:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:30,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:31,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:35,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:35,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:59:35,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:59:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:35,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:35,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:59:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:59:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:59:35,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:36,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:36,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:36,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:59:36,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:36,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 17:59:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:36,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:36,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:36,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 17:59:36,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:36,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:36,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:59:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:59:36,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971767914] [2020-10-14 17:59:36,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:36,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:59:36,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981108133] [2020-10-14 17:59:36,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:59:36,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:59:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:59:36,177 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 12 states. [2020-10-14 17:59:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:36,779 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-14 17:59:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:59:36,780 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 17:59:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:36,786 INFO L225 Difference]: With dead ends: 54 [2020-10-14 17:59:36,786 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 17:59:36,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:59:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 17:59:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-14 17:59:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 17:59:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-14 17:59:36,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2020-10-14 17:59:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:36,823 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-14 17:59:36,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:59:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-14 17:59:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:59:36,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:36,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:36,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:59:36,826 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:36,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1778939977, now seen corresponding path program 2 times [2020-10-14 17:59:36,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:36,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081116536] [2020-10-14 17:59:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:37,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:37,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:41,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:41,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:59:41,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:59:41,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:41,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:41,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:41,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:59:41,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:59:41,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:59:41,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:42,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:42,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:42,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:42,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:42,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:42,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:42,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:42,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:42,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 17:59:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 17:59:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:42,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:59:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:42,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:59:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:59:42,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081116536] [2020-10-14 17:59:42,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:42,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:59:42,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957829079] [2020-10-14 17:59:42,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:59:42,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:59:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:59:42,195 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 13 states. [2020-10-14 17:59:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:42,703 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-14 17:59:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:59:42,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-14 17:59:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:42,706 INFO L225 Difference]: With dead ends: 56 [2020-10-14 17:59:42,706 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 17:59:42,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:59:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 17:59:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-14 17:59:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:59:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-14 17:59:42,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 35 [2020-10-14 17:59:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:42,719 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-14 17:59:42,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:59:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-14 17:59:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:59:42,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:42,721 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:42,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:59:42,721 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash 975042507, now seen corresponding path program 3 times [2020-10-14 17:59:42,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:42,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868583534] [2020-10-14 17:59:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:42,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:47,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:47,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:59:47,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:59:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:47,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:47,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:59:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:59:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 17:59:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:47,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:47,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:47,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:47,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:47,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:47,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-14 17:59:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:47,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:47,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:47,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:47,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:59:47,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:47,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:47,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:59:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:59:48,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868583534] [2020-10-14 17:59:48,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:59:48,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779640936] [2020-10-14 17:59:48,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:59:48,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:59:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:59:48,038 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 14 states. [2020-10-14 17:59:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:48,432 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-14 17:59:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:59:48,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 17:59:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:48,434 INFO L225 Difference]: With dead ends: 58 [2020-10-14 17:59:48,434 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 17:59:48,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:59:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 17:59:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-14 17:59:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:59:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-14 17:59:48,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 36 [2020-10-14 17:59:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:48,443 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-14 17:59:48,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:59:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-14 17:59:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:59:48,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:48,444 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:48,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:59:48,445 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 449153591, now seen corresponding path program 4 times [2020-10-14 17:59:48,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:48,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283960389] [2020-10-14 17:59:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:48,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:49,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:53,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:59:53,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:59:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:53,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:53,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:53,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:59:53,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 17:59:53,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:59:53,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:53,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:53,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:53,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:53,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:53,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:53,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:53,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:53,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:59:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:53,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:53,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:53,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:53,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:53,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:53,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:59:53,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283960389] [2020-10-14 17:59:53,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:53,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:59:53,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756941932] [2020-10-14 17:59:53,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:59:53,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:59:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:59:53,601 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 12 states. [2020-10-14 17:59:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:54,134 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-14 17:59:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:59:54,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-14 17:59:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:54,136 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:59:54,136 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:59:54,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:59:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:59:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-14 17:59:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:59:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-14 17:59:54,146 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2020-10-14 17:59:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:54,146 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-14 17:59:54,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:59:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-14 17:59:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:59:54,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:54,148 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:54,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:59:54,148 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1148359152, now seen corresponding path program 5 times [2020-10-14 17:59:54,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:54,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654388846] [2020-10-14 17:59:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:59:59,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:59:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 17:59:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:59:59,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:59,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:59,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 17:59:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:59,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:59,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:59:59,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:59,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:59,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 17:59:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:59:59,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:59,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:59,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:59,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 17:59:59,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:59:59,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:59:59,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654388846] [2020-10-14 17:59:59,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:59,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:59:59,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978361350] [2020-10-14 17:59:59,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:59:59,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:59:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:59:59,651 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 19 states. [2020-10-14 18:00:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:00,367 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-14 18:00:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:00:00,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-14 18:00:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:00,370 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:00:00,370 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 18:00:00,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:00:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 18:00:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-14 18:00:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 18:00:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-14 18:00:00,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 49 [2020-10-14 18:00:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:00,383 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-14 18:00:00,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:00:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-14 18:00:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:00:00,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:00,385 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:00,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:00:00,385 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1697334288, now seen corresponding path program 6 times [2020-10-14 18:00:00,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:00,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631945718] [2020-10-14 18:00:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:01,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:05,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:05,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:00:05,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:00:05,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:00:05,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:05,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:05,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:00:05,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:00:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:00:05,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:05,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:05,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:05,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:05,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:05,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:05,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:05,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 18:00:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:05,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:05,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:05,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:00:05,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:05,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:05,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:05,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 18:00:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:05,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:05,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:05,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:05,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:05,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:05,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:05,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:05,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:00:05,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631945718] [2020-10-14 18:00:05,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:05,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:00:05,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642372299] [2020-10-14 18:00:05,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:00:05,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:00:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:00:05,916 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 19 states. [2020-10-14 18:00:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:06,497 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-14 18:00:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:00:06,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-14 18:00:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:06,499 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:00:06,499 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:00:06,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:00:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:00:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-14 18:00:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 18:00:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-14 18:00:06,511 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 51 [2020-10-14 18:00:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:06,511 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-14 18:00:06,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:00:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-14 18:00:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:00:06,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:06,513 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:06,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:00:06,513 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash -514562576, now seen corresponding path program 7 times [2020-10-14 18:00:06,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:06,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876346166] [2020-10-14 18:00:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:06,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:08,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:09,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:11,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:11,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:00:11,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:00:11,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:00:11,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:11,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:00:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:12,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:12,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:12,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:00:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:12,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:12,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:00:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:00:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:12,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:12,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:12,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:00:12,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876346166] [2020-10-14 18:00:12,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:12,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:00:12,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055117808] [2020-10-14 18:00:12,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:00:12,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:00:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:00:12,087 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 21 states. [2020-10-14 18:00:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:12,736 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-10-14 18:00:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:00:12,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 18:00:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:12,739 INFO L225 Difference]: With dead ends: 97 [2020-10-14 18:00:12,739 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:00:12,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:00:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:00:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-10-14 18:00:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 18:00:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-14 18:00:12,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 53 [2020-10-14 18:00:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:12,751 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-14 18:00:12,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:00:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-14 18:00:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:00:12,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:12,752 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:12,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:00:12,752 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2037280784, now seen corresponding path program 8 times [2020-10-14 18:00:12,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:12,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878181162] [2020-10-14 18:00:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:17,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:17,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:00:17,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:00:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:18,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:18,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:18,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:00:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:18,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:18,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:18,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:18,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:00:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:00:18,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878181162] [2020-10-14 18:00:18,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:18,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:00:18,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216723859] [2020-10-14 18:00:18,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:00:18,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:00:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:00:18,369 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 21 states. [2020-10-14 18:00:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:18,875 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2020-10-14 18:00:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:00:18,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-14 18:00:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:18,877 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:00:18,878 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:00:18,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:00:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:00:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-14 18:00:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:00:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-14 18:00:18,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 55 [2020-10-14 18:00:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:18,899 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-14 18:00:18,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:00:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-14 18:00:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:00:18,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:18,903 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:18,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:00:18,903 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1088841024, now seen corresponding path program 9 times [2020-10-14 18:00:18,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:18,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538600053] [2020-10-14 18:00:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:23,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:23,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:00:23,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:00:23,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:24,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:24,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:24,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 18:00:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:24,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:24,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:24,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:24,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:24,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:24,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:24,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:24,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 18:00:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:24,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:24,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:24,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:24,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:00:24,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538600053] [2020-10-14 18:00:24,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:24,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:00:24,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90402583] [2020-10-14 18:00:24,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:00:24,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:00:24,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:00:24,596 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 23 states. [2020-10-14 18:00:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:25,117 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-10-14 18:00:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:00:25,118 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-14 18:00:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:25,119 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:00:25,120 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 18:00:25,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:00:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 18:00:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-10-14 18:00:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:00:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-14 18:00:25,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 56 [2020-10-14 18:00:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:25,132 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-14 18:00:25,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:00:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-14 18:00:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:00:25,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:25,134 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:25,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:00:25,134 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -785630736, now seen corresponding path program 10 times [2020-10-14 18:00:25,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:25,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048533243] [2020-10-14 18:00:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:25,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:26,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:27,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:30,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:00:30,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:30,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:30,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:30,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:30,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:00:30,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:30,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:00:30,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:30,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:30,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:00:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:30,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:30,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:30,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 18:00:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:30,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:30,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 85 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:00:30,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048533243] [2020-10-14 18:00:30,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:30,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:00:30,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264935380] [2020-10-14 18:00:30,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:00:30,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:00:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:00:30,854 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 23 states. [2020-10-14 18:00:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:31,392 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-10-14 18:00:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:00:31,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-14 18:00:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:31,395 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:00:31,395 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 18:00:31,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:00:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 18:00:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-10-14 18:00:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:00:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-14 18:00:31,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 57 [2020-10-14 18:00:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:31,407 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-14 18:00:31,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:00:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-14 18:00:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:00:31,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:31,409 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:31,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:00:31,409 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1235286848, now seen corresponding path program 11 times [2020-10-14 18:00:31,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:31,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035228646] [2020-10-14 18:00:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:32,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:33,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:36,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:00:36,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:00:36,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:37,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:37,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:37,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:37,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:00:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:37,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:37,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:37,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:37,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:37,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:37,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:37,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:37,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:37,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:00:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:37,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:37,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:37,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:37,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 98 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:00:37,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035228646] [2020-10-14 18:00:37,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:37,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:00:37,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221365178] [2020-10-14 18:00:37,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:00:37,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:00:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:00:37,442 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 25 states. [2020-10-14 18:00:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:38,043 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2020-10-14 18:00:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:00:38,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 18:00:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:38,045 INFO L225 Difference]: With dead ends: 111 [2020-10-14 18:00:38,045 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:00:38,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:00:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:00:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2020-10-14 18:00:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:00:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-14 18:00:38,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 58 [2020-10-14 18:00:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:38,067 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-14 18:00:38,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:00:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-14 18:00:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:00:38,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:38,068 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:38,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:00:38,069 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash -540777488, now seen corresponding path program 12 times [2020-10-14 18:00:38,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:38,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264103021] [2020-10-14 18:00:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:38,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:38,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:38,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:39,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:43,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:00:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:44,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:44,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:44,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:44,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:44,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 18:00:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:44,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:00:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:44,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:00:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264103021] [2020-10-14 18:00:44,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:44,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:00:44,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124497094] [2020-10-14 18:00:44,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:00:44,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:00:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:00:44,067 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 26 states. [2020-10-14 18:00:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:44,818 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-10-14 18:00:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:00:44,818 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-14 18:00:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:44,820 INFO L225 Difference]: With dead ends: 114 [2020-10-14 18:00:44,820 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 18:00:44,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:00:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 18:00:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-14 18:00:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:00:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-14 18:00:44,830 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 59 [2020-10-14 18:00:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:44,830 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-14 18:00:44,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:00:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-14 18:00:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:00:44,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:44,831 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:44,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:00:44,832 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:44,832 INFO L82 PathProgramCache]: Analyzing trace with hash 235802944, now seen corresponding path program 13 times [2020-10-14 18:00:44,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:44,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862474674] [2020-10-14 18:00:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:44,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:49,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:49,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:00:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:00:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:49,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:49,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:00:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:49,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:00:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:50,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:50,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:50,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:50,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:50,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:50,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:50,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:50,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:50,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:50,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:00:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:50,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:50,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:50,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:50,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:50,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:50,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:50,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:00:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:50,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:50,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:50,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:50,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:50,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:50,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:50,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 9 proven. 127 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:00:50,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862474674] [2020-10-14 18:00:50,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:50,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:00:50,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578460461] [2020-10-14 18:00:51,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:00:51,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:00:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:00:51,002 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 26 states. [2020-10-14 18:00:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:51,594 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-10-14 18:00:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:00:51,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 18:00:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:51,597 INFO L225 Difference]: With dead ends: 117 [2020-10-14 18:00:51,597 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 18:00:51,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:00:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 18:00:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2020-10-14 18:00:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:00:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-14 18:00:51,608 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 60 [2020-10-14 18:00:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:51,609 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-14 18:00:51,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:00:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-14 18:00:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:00:51,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:51,610 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:51,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:00:51,611 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1460007440, now seen corresponding path program 14 times [2020-10-14 18:00:51,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:51,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335299651] [2020-10-14 18:00:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:51,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:55,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:56,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:56,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:00:56,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:00:56,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:00:56,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:56,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:00:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:00:56,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:00:56,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:57,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:57,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:00:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:57,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:57,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:57,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:00:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:57,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:57,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 143 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:00:57,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335299651] [2020-10-14 18:00:57,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:57,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:00:57,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107941630] [2020-10-14 18:00:57,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:00:57,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:00:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:00:57,726 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 28 states. [2020-10-14 18:00:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:58,401 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2020-10-14 18:00:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:00:58,402 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-14 18:00:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:58,403 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:00:58,403 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 18:00:58,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=762, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:00:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 18:00:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2020-10-14 18:00:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:00:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-14 18:00:58,417 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 61 [2020-10-14 18:00:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:58,417 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-14 18:00:58,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:00:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-14 18:00:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:00:58,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:58,419 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:58,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:00:58,419 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1804445504, now seen corresponding path program 15 times [2020-10-14 18:00:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:58,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404805568] [2020-10-14 18:00:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:58,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:58,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:58,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:01:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:04,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:04,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:04,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:04,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:04,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:04,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:04,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:04,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:04,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:04,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-14 18:01:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:04,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:04,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:04,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:04,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:04,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:04,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:04,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:04,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:04,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:04,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:04,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-14 18:01:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:04,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:04,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:04,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:04,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:04,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:04,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:04,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:04,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 9 proven. 160 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:01:04,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404805568] [2020-10-14 18:01:04,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:04,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:01:04,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650497584] [2020-10-14 18:01:04,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:01:04,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:01:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:04,616 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 28 states. [2020-10-14 18:01:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:05,400 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2020-10-14 18:01:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:01:05,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 18:01:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:05,403 INFO L225 Difference]: With dead ends: 123 [2020-10-14 18:01:05,403 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:01:05,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=762, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:01:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:01:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2020-10-14 18:01:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 18:01:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-14 18:01:05,413 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 62 [2020-10-14 18:01:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:05,413 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-14 18:01:05,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:01:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-14 18:01:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:01:05,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:05,414 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:05,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:01:05,415 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:05,415 INFO L82 PathProgramCache]: Analyzing trace with hash -76728336, now seen corresponding path program 16 times [2020-10-14 18:01:05,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:05,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410913407] [2020-10-14 18:01:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:06,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:01:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:11,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:11,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:11,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:11,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:11,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:11,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:11,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:11,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:11,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:01:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:11,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:01:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:11,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:11,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:11,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:11,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:11,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:11,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:11,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:11,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:11,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:01:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:01:11,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410913407] [2020-10-14 18:01:11,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:11,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:01:11,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909390341] [2020-10-14 18:01:11,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:01:11,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:01:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:11,818 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 29 states. [2020-10-14 18:01:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:12,638 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2020-10-14 18:01:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:01:12,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-14 18:01:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:12,640 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:01:12,640 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 18:01:12,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=803, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:01:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 18:01:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2020-10-14 18:01:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:01:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-14 18:01:12,651 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 63 [2020-10-14 18:01:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:12,652 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-14 18:01:12,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:01:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-14 18:01:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:01:12,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:12,654 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:12,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:01:12,654 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1736424768, now seen corresponding path program 17 times [2020-10-14 18:01:12,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:12,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445209674] [2020-10-14 18:01:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:17,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:17,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:01:17,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:01:17,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:01:17,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:19,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:19,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:19,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:19,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 18:01:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:19,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:19,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:19,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:19,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:19,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:19,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-14 18:01:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:19,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:19,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:19,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:19,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:19,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:19,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:19,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:19,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 9 proven. 195 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:01:19,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445209674] [2020-10-14 18:01:19,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:19,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:01:19,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174231377] [2020-10-14 18:01:19,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:01:19,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:01:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:19,159 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 29 states. [2020-10-14 18:01:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:20,001 INFO L93 Difference]: Finished difference Result 149 states and 210 transitions. [2020-10-14 18:01:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:01:20,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 18:01:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:20,003 INFO L225 Difference]: With dead ends: 149 [2020-10-14 18:01:20,003 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 18:01:20,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:01:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 18:01:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 68. [2020-10-14 18:01:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:01:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-14 18:01:20,016 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2020-10-14 18:01:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:20,016 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-14 18:01:20,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:01:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-14 18:01:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:01:20,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:20,017 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:20,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:01:20,017 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2109596144, now seen corresponding path program 18 times [2020-10-14 18:01:20,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:20,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687642566] [2020-10-14 18:01:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:20,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:21,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:25,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:25,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:01:25,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:01:25,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:01:25,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:26,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:26,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:26,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:26,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:26,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:26,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:26,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:26,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 18:01:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:26,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:26,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:26,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:26,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:26,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:26,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:26,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:26,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:26,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:26,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:01:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:26,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:26,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:26,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:26,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:26,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:26,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:01:26,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687642566] [2020-10-14 18:01:26,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:26,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:01:26,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330352910] [2020-10-14 18:01:26,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:01:26,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:01:26,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:01:26,430 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 30 states. [2020-10-14 18:01:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:27,412 INFO L93 Difference]: Finished difference Result 153 states and 217 transitions. [2020-10-14 18:01:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:01:27,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-14 18:01:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:27,414 INFO L225 Difference]: With dead ends: 153 [2020-10-14 18:01:27,414 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 18:01:27,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:01:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 18:01:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 69. [2020-10-14 18:01:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:01:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-14 18:01:27,428 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2020-10-14 18:01:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:27,428 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-14 18:01:27,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:01:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-14 18:01:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:01:27,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:27,429 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:27,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:01:27,430 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash 793006912, now seen corresponding path program 19 times [2020-10-14 18:01:27,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:27,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488080559] [2020-10-14 18:01:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:29,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:32,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:32,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:01:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:34,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:34,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:01:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:34,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:34,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:34,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:34,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:34,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:34,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:34,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:01:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 10 proven. 238 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:01:34,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488080559] [2020-10-14 18:01:34,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:34,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:01:34,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877119002] [2020-10-14 18:01:34,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:01:34,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:01:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:01:34,128 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 33 states. [2020-10-14 18:01:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:35,001 INFO L93 Difference]: Finished difference Result 135 states and 182 transitions. [2020-10-14 18:01:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:01:35,001 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-10-14 18:01:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:35,002 INFO L225 Difference]: With dead ends: 135 [2020-10-14 18:01:35,003 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:01:35,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=505, Invalid=977, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:01:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:01:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-10-14 18:01:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:01:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-14 18:01:35,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 66 [2020-10-14 18:01:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-14 18:01:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:01:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-14 18:01:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 18:01:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:35,025 INFO L422 BasicCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:35,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:01:35,025 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1366553616, now seen corresponding path program 20 times [2020-10-14 18:01:35,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:35,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065978308] [2020-10-14 18:01:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:35,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:36,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:40,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:01:40,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:01:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:41,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:41,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:41,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:41,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:41,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:41,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:41,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:01:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 18:01:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:41,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:41,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 9 proven. 258 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:01:41,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065978308] [2020-10-14 18:01:41,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:41,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:01:41,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121611500] [2020-10-14 18:01:41,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:01:41,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:01:41,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=632, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:01:41,626 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 32 states. [2020-10-14 18:01:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:42,624 INFO L93 Difference]: Finished difference Result 161 states and 231 transitions. [2020-10-14 18:01:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:01:42,628 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2020-10-14 18:01:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:42,629 INFO L225 Difference]: With dead ends: 161 [2020-10-14 18:01:42,630 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 18:01:42,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:01:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 18:01:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 71. [2020-10-14 18:01:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:01:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-14 18:01:42,642 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2020-10-14 18:01:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:42,643 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-14 18:01:42,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:01:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-14 18:01:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:01:42,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:42,644 INFO L422 BasicCegarLoop]: trace histogram [23, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:42,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:01:42,644 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 406546752, now seen corresponding path program 21 times [2020-10-14 18:01:42,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:42,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011333875] [2020-10-14 18:01:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:42,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:43,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:44,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:01:47,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:01:47,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:01:47,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:49,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:49,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:49,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:49,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:01:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:49,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:49,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:01:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:49,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 9 proven. 281 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:01:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011333875] [2020-10-14 18:01:49,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:49,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:01:49,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967271293] [2020-10-14 18:01:49,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:01:49,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:01:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:01:49,340 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 33 states. [2020-10-14 18:01:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:50,419 INFO L93 Difference]: Finished difference Result 165 states and 238 transitions. [2020-10-14 18:01:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:01:50,420 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2020-10-14 18:01:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:50,422 INFO L225 Difference]: With dead ends: 165 [2020-10-14 18:01:50,422 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 18:01:50,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=923, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:01:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 18:01:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 72. [2020-10-14 18:01:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 18:01:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-14 18:01:50,437 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 68 [2020-10-14 18:01:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:50,440 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-14 18:01:50,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:01:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-14 18:01:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:01:50,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:50,442 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:50,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:01:50,442 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -461916688, now seen corresponding path program 22 times [2020-10-14 18:01:50,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:50,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564691886] [2020-10-14 18:01:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:50,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:55,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:01:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:01:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:01:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:57,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:01:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:57,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:01:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:01:57,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:01:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 18:01:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:01:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:57,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 9 proven. 305 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:01:57,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564691886] [2020-10-14 18:01:57,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:57,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:01:57,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546599879] [2020-10-14 18:01:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:01:57,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:01:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=707, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:01:57,281 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 34 states. [2020-10-14 18:01:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:58,240 INFO L93 Difference]: Finished difference Result 169 states and 245 transitions. [2020-10-14 18:01:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:01:58,240 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2020-10-14 18:01:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:58,242 INFO L225 Difference]: With dead ends: 169 [2020-10-14 18:01:58,242 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 18:01:58,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=514, Invalid=968, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:01:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 18:01:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 73. [2020-10-14 18:01:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:01:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-14 18:01:58,262 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 69 [2020-10-14 18:01:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:58,262 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-14 18:01:58,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:01:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-14 18:01:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:01:58,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:58,263 INFO L422 BasicCegarLoop]: trace histogram [25, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:58,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:01:58,263 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1614479552, now seen corresponding path program 23 times [2020-10-14 18:01:58,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:58,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726251995] [2020-10-14 18:01:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:59,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:02:03,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:03,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:02:03,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:05,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:05,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:05,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-14 18:02:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:05,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-14 18:02:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 9 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:05,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726251995] [2020-10-14 18:02:05,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:05,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:02:05,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352768539] [2020-10-14 18:02:05,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:02:05,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:02:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:05,275 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 35 states. [2020-10-14 18:02:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:06,419 INFO L93 Difference]: Finished difference Result 173 states and 252 transitions. [2020-10-14 18:02:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:02:06,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 70 [2020-10-14 18:02:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:06,421 INFO L225 Difference]: With dead ends: 173 [2020-10-14 18:02:06,422 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 18:02:06,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:02:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 18:02:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 74. [2020-10-14 18:02:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:02:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-10-14 18:02:06,435 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 70 [2020-10-14 18:02:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:06,436 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-10-14 18:02:06,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:02:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-10-14 18:02:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:02:06,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:06,437 INFO L422 BasicCegarLoop]: trace histogram [26, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:06,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:02:06,437 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1310777328, now seen corresponding path program 24 times [2020-10-14 18:02:06,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:06,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139019265] [2020-10-14 18:02:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:07,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:09,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:11,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:02:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:02:11,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:13,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:13,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:13,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:02:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:13,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:13,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:13,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:13,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:13,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:02:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:13,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:13,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:13,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:13,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:13,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:13,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:13,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:13,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:13,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:13,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:13,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 9 proven. 356 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:13,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139019265] [2020-10-14 18:02:13,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:13,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:02:13,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228018038] [2020-10-14 18:02:13,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:02:13,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:13,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:02:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=786, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:13,618 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 36 states. [2020-10-14 18:02:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:14,850 INFO L93 Difference]: Finished difference Result 177 states and 259 transitions. [2020-10-14 18:02:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:02:14,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-10-14 18:02:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:14,853 INFO L225 Difference]: With dead ends: 177 [2020-10-14 18:02:14,853 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 18:02:14,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=579, Invalid=1061, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:02:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 18:02:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 75. [2020-10-14 18:02:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 18:02:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-14 18:02:14,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 71 [2020-10-14 18:02:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:14,867 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-14 18:02:14,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:02:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-14 18:02:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:02:14,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:14,867 INFO L422 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:14,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:02:14,868 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1799427392, now seen corresponding path program 25 times [2020-10-14 18:02:14,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:14,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288506622] [2020-10-14 18:02:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:14,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:14,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:19,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:02:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:02:19,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:22,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:22,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:22,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:22,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:22,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-14 18:02:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:22,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:22,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-14 18:02:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:22,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 9 proven. 383 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:22,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288506622] [2020-10-14 18:02:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:02:22,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631181290] [2020-10-14 18:02:22,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:02:22,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:02:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=827, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:22,175 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 37 states. [2020-10-14 18:02:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:23,346 INFO L93 Difference]: Finished difference Result 181 states and 266 transitions. [2020-10-14 18:02:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:02:23,349 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-10-14 18:02:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:23,351 INFO L225 Difference]: With dead ends: 181 [2020-10-14 18:02:23,352 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 18:02:23,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:02:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 18:02:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 76. [2020-10-14 18:02:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 18:02:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-14 18:02:23,387 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 72 [2020-10-14 18:02:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:23,388 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-14 18:02:23,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:02:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-14 18:02:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:02:23,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:23,389 INFO L422 BasicCegarLoop]: trace histogram [28, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:23,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:02:23,390 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash -232289808, now seen corresponding path program 26 times [2020-10-14 18:02:23,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:23,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423327135] [2020-10-14 18:02:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:23,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:25,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:27,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:28,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:28,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:02:28,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:02:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:02:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:31,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:31,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:31,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:31,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:31,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:31,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:31,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:02:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:31,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:31,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:31,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-14 18:02:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:31,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:31,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:31,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:31,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:31,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:31,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:31,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:31,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 10 proven. 413 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:02:31,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423327135] [2020-10-14 18:02:31,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:31,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:02:31,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309250821] [2020-10-14 18:02:31,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:02:31,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:02:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=958, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:02:31,234 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 40 states. [2020-10-14 18:02:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:32,425 INFO L93 Difference]: Finished difference Result 156 states and 217 transitions. [2020-10-14 18:02:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:02:32,426 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 73 [2020-10-14 18:02:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:32,428 INFO L225 Difference]: With dead ends: 156 [2020-10-14 18:02:32,428 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 18:02:32,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=750, Invalid=1320, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:02:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 18:02:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 77. [2020-10-14 18:02:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:02:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-14 18:02:32,444 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 73 [2020-10-14 18:02:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:32,444 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-14 18:02:32,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:02:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-14 18:02:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:02:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:32,445 INFO L422 BasicCegarLoop]: trace histogram [29, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:32,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:02:32,446 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1208986432, now seen corresponding path program 27 times [2020-10-14 18:02:32,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:32,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749186338] [2020-10-14 18:02:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:32,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:32,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:33,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:37,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:37,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:02:37,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:02:37,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:40,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:40,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:40,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:40,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:40,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:02:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-14 18:02:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:40,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:40,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 9 proven. 440 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:40,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749186338] [2020-10-14 18:02:40,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:40,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:02:40,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965142394] [2020-10-14 18:02:40,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:02:40,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:02:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:02:40,114 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 39 states. [2020-10-14 18:02:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:41,481 INFO L93 Difference]: Finished difference Result 189 states and 280 transitions. [2020-10-14 18:02:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:02:41,482 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2020-10-14 18:02:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:41,484 INFO L225 Difference]: With dead ends: 189 [2020-10-14 18:02:41,484 INFO L226 Difference]: Without dead ends: 168 [2020-10-14 18:02:41,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=684, Invalid=1208, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:02:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-14 18:02:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 78. [2020-10-14 18:02:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 18:02:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-14 18:02:41,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 74 [2020-10-14 18:02:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:41,501 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-14 18:02:41,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:02:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-14 18:02:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:02:41,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:41,501 INFO L422 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:41,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:02:41,502 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1356090384, now seen corresponding path program 28 times [2020-10-14 18:02:41,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:41,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079856669] [2020-10-14 18:02:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:46,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:46,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:02:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 18:02:46,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:49,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:49,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 18:02:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:49,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 18:02:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:49,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 9 proven. 470 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:49,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079856669] [2020-10-14 18:02:49,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:49,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:02:49,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119698357] [2020-10-14 18:02:49,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:02:49,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:02:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=956, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:02:49,401 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 40 states. [2020-10-14 18:02:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:50,757 INFO L93 Difference]: Finished difference Result 193 states and 287 transitions. [2020-10-14 18:02:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:02:50,759 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 75 [2020-10-14 18:02:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:50,761 INFO L225 Difference]: With dead ends: 193 [2020-10-14 18:02:50,761 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:02:50,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=721, Invalid=1259, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:02:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:02:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 79. [2020-10-14 18:02:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:02:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-14 18:02:50,781 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 75 [2020-10-14 18:02:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:50,781 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-14 18:02:50,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:02:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-14 18:02:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:02:50,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:50,782 INFO L422 BasicCegarLoop]: trace histogram [31, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:50,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:02:50,782 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash 730906944, now seen corresponding path program 29 times [2020-10-14 18:02:50,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:50,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135222155] [2020-10-14 18:02:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:50,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:50,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:55,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:55,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:02:55,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:02:55,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:02:55,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:58,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:58,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:58,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:58,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:58,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:58,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:58,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:02:58,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:02:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:58,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:02:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:02:58,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:58,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:02:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:58,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:58,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:58,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:02:58,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:58,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:58,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:58,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:02:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:58,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 9 proven. 501 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:02:58,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135222155] [2020-10-14 18:02:58,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:58,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:02:58,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381693461] [2020-10-14 18:02:58,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:02:58,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:02:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:02:58,886 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 41 states. [2020-10-14 18:03:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:00,618 INFO L93 Difference]: Finished difference Result 197 states and 294 transitions. [2020-10-14 18:03:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:03:00,618 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-10-14 18:03:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:00,620 INFO L225 Difference]: With dead ends: 197 [2020-10-14 18:03:00,620 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 18:03:00,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=759, Invalid=1311, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:03:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 18:03:00,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 80. [2020-10-14 18:03:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 18:03:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-14 18:03:00,648 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 76 [2020-10-14 18:03:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:00,648 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-14 18:03:00,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:03:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-14 18:03:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:03:00,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:00,649 INFO L422 BasicCegarLoop]: trace histogram [32, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:00,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:03:00,649 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1003314672, now seen corresponding path program 30 times [2020-10-14 18:03:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:00,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330363098] [2020-10-14 18:03:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:05,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:03:05,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:08,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:08,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:08,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:08,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:08,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:08,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:08,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:08,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:08,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:08,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:08,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:08,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 18:03:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:08,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:08,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:03:08,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:08,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:08,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:08,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:03:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:03:08,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:08,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-14 18:03:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:08,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:03:08,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:08,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:08,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:08,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:03:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:08,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 9 proven. 533 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:03:08,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330363098] [2020-10-14 18:03:08,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:08,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:03:08,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160627450] [2020-10-14 18:03:08,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:03:08,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:03:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1047, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:08,904 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 42 states. [2020-10-14 18:03:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:10,610 INFO L93 Difference]: Finished difference Result 201 states and 301 transitions. [2020-10-14 18:03:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:03:10,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 77 [2020-10-14 18:03:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:10,613 INFO L225 Difference]: With dead ends: 201 [2020-10-14 18:03:10,613 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 18:03:10,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=798, Invalid=1364, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:03:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 18:03:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 81. [2020-10-14 18:03:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:03:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-14 18:03:10,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 77 [2020-10-14 18:03:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:10,638 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-14 18:03:10,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:03:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-14 18:03:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:03:10,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:10,639 INFO L422 BasicCegarLoop]: trace histogram [33, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:10,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:03:10,639 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash 858019648, now seen corresponding path program 31 times [2020-10-14 18:03:10,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536887903] [2020-10-14 18:03:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking...