/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:29:36,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:29:36,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:29:36,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:29:36,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:29:36,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:29:36,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:29:36,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:29:36,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:29:36,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:29:36,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:29:36,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:29:36,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:29:36,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:29:36,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:29:36,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:29:36,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:29:36,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:29:36,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:29:36,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:29:36,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:29:36,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:29:36,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:29:36,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:29:36,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:29:36,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:29:36,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:29:36,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:29:36,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:29:36,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:29:36,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:29:36,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:29:36,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:29:36,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:29:36,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:29:36,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:29:36,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:29:36,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:29:36,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:29:36,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:29:36,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:29:36,143 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 08:29:36,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:29:36,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:29:36,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:29:36,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:29:36,185 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:29:36,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:29:36,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:29:36,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:29:36,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:29:36,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:29:36,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:29:36,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:29:36,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:29:36,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:29:36,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:29:36,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:29:36,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:29:36,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:29:36,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:29:36,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:29:36,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:29:36,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:29:36,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:29:36,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:29:36,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:29:36,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:29:36,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:29:36,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:29:36,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:29:36,192 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:29:36,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:29:36,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:29:36,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:29:36,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:29:36,507 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:29:36,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-14 08:29:36,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1fa3fa5e/b600be1ca9884ebab6fb929bb8ab27c5/FLAGcaddec113 [2020-10-14 08:29:37,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:29:37,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-14 08:29:37,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1fa3fa5e/b600be1ca9884ebab6fb929bb8ab27c5/FLAGcaddec113 [2020-10-14 08:29:37,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1fa3fa5e/b600be1ca9884ebab6fb929bb8ab27c5 [2020-10-14 08:29:37,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:29:37,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:29:37,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:29:37,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:29:37,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:29:37,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:29:37" (1/1) ... [2020-10-14 08:29:37,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184fc857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:37, skipping insertion in model container [2020-10-14 08:29:37,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:29:37" (1/1) ... [2020-10-14 08:29:37,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:29:37,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:29:38,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:29:38,567 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:29:39,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:29:39,328 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:29:39,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39 WrapperNode [2020-10-14 08:29:39,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:29:39,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:29:39,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:29:39,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:29:39,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (1/1) ... [2020-10-14 08:29:39,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:29:39,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:29:39,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:29:39,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:29:39,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (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 08:29:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:29:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:29:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:29:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:29:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:29:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:29:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:29:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:29:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:29:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:29:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:29:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:29:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:29:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:29:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:29:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:29:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:29:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:29:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:29:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:29:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:29:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:29:41,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:29:41,931 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:29:41,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:29:41 BoogieIcfgContainer [2020-10-14 08:29:41,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:29:41,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:29:41,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:29:41,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:29:41,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:29:37" (1/3) ... [2020-10-14 08:29:41,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666cea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:29:41, skipping insertion in model container [2020-10-14 08:29:41,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:29:39" (2/3) ... [2020-10-14 08:29:41,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666cea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:29:41, skipping insertion in model container [2020-10-14 08:29:41,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:29:41" (3/3) ... [2020-10-14 08:29:41,948 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-14 08:29:41,959 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:29:41,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:29:41,982 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:29:42,008 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:29:42,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:29:42,008 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:29:42,008 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:29:42,008 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:29:42,008 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:29:42,009 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:29:42,009 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:29:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states. [2020-10-14 08:29:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-14 08:29:42,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:29:42,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:29:42,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:29:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:29:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 373838738, now seen corresponding path program 1 times [2020-10-14 08:29:42,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:29:42,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508885648] [2020-10-14 08:29:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:29:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:29:43,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:44,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:45,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:45,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:47,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:48,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:29:48,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-14 08:29:48,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:29:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 08:29:48,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:29:48,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:29:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:29:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:29:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-14 08:29:48,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:29:49,047 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:29:49,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:29:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:29:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:49,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:29:49,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:29:49,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:29:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 08:29:49,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:29:49,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:29:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:29:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:29:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:29:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:29:49,328 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 08:29:49,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508885648] [2020-10-14 08:29:49,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:29:49,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:29:49,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077636015] [2020-10-14 08:29:49,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:29:49,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:29:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:29:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:29:49,355 INFO L87 Difference]: Start difference. First operand 737 states. Second operand 5 states. [2020-10-14 08:29:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:29:56,915 INFO L93 Difference]: Finished difference Result 2164 states and 3854 transitions. [2020-10-14 08:29:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:29:56,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 314 [2020-10-14 08:29:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:29:56,947 INFO L225 Difference]: With dead ends: 2164 [2020-10-14 08:29:56,948 INFO L226 Difference]: Without dead ends: 1432 [2020-10-14 08:29:56,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:29:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2020-10-14 08:29:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1430. [2020-10-14 08:29:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1430 states. [2020-10-14 08:29:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 2203 transitions. [2020-10-14 08:29:57,105 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 2203 transitions. Word has length 314 [2020-10-14 08:29:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:29:57,107 INFO L479 AbstractCegarLoop]: Abstraction has 1430 states and 2203 transitions. [2020-10-14 08:29:57,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:29:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 2203 transitions. [2020-10-14 08:29:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-14 08:29:57,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:29:57,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:29:57,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:29:57,127 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:29:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:29:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -665055542, now seen corresponding path program 1 times [2020-10-14 08:29:57,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:29:57,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282796223] [2020-10-14 08:29:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:29:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:29:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:57,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:29:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:02,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:02,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-14 08:30:02,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:30:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-14 08:30:02,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:02,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:30:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:30:02,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:30:02,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:02,777 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:30:02,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:30:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:02,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:30:02,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:30:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:30:02,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:02,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:30:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:30:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:30:02,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:02,909 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 08:30:02,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282796223] [2020-10-14 08:30:02,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:30:02,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:30:02,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258038221] [2020-10-14 08:30:02,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:30:02,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:30:02,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:30:02,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:02,916 INFO L87 Difference]: Start difference. First operand 1430 states and 2203 transitions. Second operand 4 states. [2020-10-14 08:30:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:30:07,901 INFO L93 Difference]: Finished difference Result 4249 states and 6545 transitions. [2020-10-14 08:30:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:30:07,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-10-14 08:30:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:30:07,919 INFO L225 Difference]: With dead ends: 4249 [2020-10-14 08:30:07,919 INFO L226 Difference]: Without dead ends: 2842 [2020-10-14 08:30:07,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-10-14 08:30:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1441. [2020-10-14 08:30:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1441 states. [2020-10-14 08:30:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2219 transitions. [2020-10-14 08:30:08,058 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2219 transitions. Word has length 316 [2020-10-14 08:30:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:30:08,058 INFO L479 AbstractCegarLoop]: Abstraction has 1441 states and 2219 transitions. [2020-10-14 08:30:08,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:30:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2219 transitions. [2020-10-14 08:30:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-14 08:30:08,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:30:08,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:08,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:30:08,066 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:30:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:30:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1923900357, now seen corresponding path program 1 times [2020-10-14 08:30:08,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:30:08,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310420173] [2020-10-14 08:30:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:30:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:08,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:09,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:10,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:10,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-14 08:30:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:30:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 08:30:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:13,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:30:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:30:13,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-14 08:30:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:13,755 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:30:13,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:30:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:13,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:13,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:30:13,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:30:13,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:30:13,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:13,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:30:13,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:30:13,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:30:13,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:13,942 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 08:30:13,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310420173] [2020-10-14 08:30:13,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:30:13,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:30:13,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415649069] [2020-10-14 08:30:13,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:30:13,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:30:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:30:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:13,945 INFO L87 Difference]: Start difference. First operand 1441 states and 2219 transitions. Second operand 4 states. [2020-10-14 08:30:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:30:22,139 INFO L93 Difference]: Finished difference Result 4095 states and 6271 transitions. [2020-10-14 08:30:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:30:22,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-10-14 08:30:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:30:22,158 INFO L225 Difference]: With dead ends: 4095 [2020-10-14 08:30:22,159 INFO L226 Difference]: Without dead ends: 2805 [2020-10-14 08:30:22,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2020-10-14 08:30:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2803. [2020-10-14 08:30:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2803 states. [2020-10-14 08:30:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4293 transitions. [2020-10-14 08:30:22,334 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4293 transitions. Word has length 316 [2020-10-14 08:30:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:30:22,335 INFO L479 AbstractCegarLoop]: Abstraction has 2803 states and 4293 transitions. [2020-10-14 08:30:22,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:30:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4293 transitions. [2020-10-14 08:30:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-14 08:30:22,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:30:22,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:22,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:30:22,345 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:30:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:30:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1939690849, now seen corresponding path program 1 times [2020-10-14 08:30:22,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:30:22,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19393796] [2020-10-14 08:30:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:30:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:22,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:22,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:23,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:25,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:25,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:27,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:27,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-14 08:30:27,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 08:30:27,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:30:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:30:27,893 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:30:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:30:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:27,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:27,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:30:27,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:30:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:30:27,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:30:27,990 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 08:30:27,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19393796] [2020-10-14 08:30:27,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:30:27,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:30:27,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926307224] [2020-10-14 08:30:27,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:30:27,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:30:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:30:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:27,993 INFO L87 Difference]: Start difference. First operand 2803 states and 4293 transitions. Second operand 4 states. [2020-10-14 08:30:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:30:35,346 INFO L93 Difference]: Finished difference Result 8314 states and 12725 transitions. [2020-10-14 08:30:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:30:35,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-14 08:30:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:30:35,377 INFO L225 Difference]: With dead ends: 8314 [2020-10-14 08:30:35,378 INFO L226 Difference]: Without dead ends: 5561 [2020-10-14 08:30:35,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2020-10-14 08:30:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 2819. [2020-10-14 08:30:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2020-10-14 08:30:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4312 transitions. [2020-10-14 08:30:35,562 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4312 transitions. Word has length 317 [2020-10-14 08:30:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:30:35,562 INFO L479 AbstractCegarLoop]: Abstraction has 2819 states and 4312 transitions. [2020-10-14 08:30:35,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:30:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4312 transitions. [2020-10-14 08:30:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-14 08:30:35,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:30:35,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:35,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:30:35,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:30:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:30:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1473892128, now seen corresponding path program 1 times [2020-10-14 08:30:35,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:30:35,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896291524] [2020-10-14 08:30:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:30:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:35,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:35,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:37,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:40,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:40,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-14 08:30:40,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:30:40,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 08:30:40,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:40,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:30:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 08:30:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 08:30:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:41,271 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:30:41,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:30:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:41,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:41,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:30:41,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:30:41,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 08:30:41,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:41,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:41,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:30:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:30:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:30:41,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:30:41,568 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 08:30:41,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896291524] [2020-10-14 08:30:41,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:30:41,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:30:41,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423393604] [2020-10-14 08:30:41,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:30:41,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:30:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:30:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:41,572 INFO L87 Difference]: Start difference. First operand 2819 states and 4312 transitions. Second operand 4 states. [2020-10-14 08:30:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:30:48,912 INFO L93 Difference]: Finished difference Result 8100 states and 12349 transitions. [2020-10-14 08:30:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:30:48,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-14 08:30:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:30:48,938 INFO L225 Difference]: With dead ends: 8100 [2020-10-14 08:30:48,938 INFO L226 Difference]: Without dead ends: 5478 [2020-10-14 08:30:48,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:30:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2020-10-14 08:30:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5476. [2020-10-14 08:30:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5476 states. [2020-10-14 08:30:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 8328 transitions. [2020-10-14 08:30:49,236 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 8328 transitions. Word has length 318 [2020-10-14 08:30:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:30:49,238 INFO L479 AbstractCegarLoop]: Abstraction has 5476 states and 8328 transitions. [2020-10-14 08:30:49,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:30:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 8328 transitions. [2020-10-14 08:30:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-14 08:30:49,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:30:49,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:30:49,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:30:49,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:30:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:30:49,255 INFO L82 PathProgramCache]: Analyzing trace with hash 542187901, now seen corresponding path program 1 times [2020-10-14 08:30:49,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:30:49,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384939824] [2020-10-14 08:30:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:30:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:49,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:50,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:51,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:54,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:54,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-14 08:30:54,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:30:54,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-14 08:30:54,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:30:55,014 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:30:55,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:30:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:30:55,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:30:55,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:30:55,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:30:55,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:30:55,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:30:55,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:30:55,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:30:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:30:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:30:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:30:55,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:30:55,221 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 08:30:55,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384939824] [2020-10-14 08:30:55,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:30:55,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:30:55,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558765729] [2020-10-14 08:30:55,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:30:55,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:30:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:30:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:30:55,226 INFO L87 Difference]: Start difference. First operand 5476 states and 8328 transitions. Second operand 5 states. [2020-10-14 08:31:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:01,871 INFO L93 Difference]: Finished difference Result 16090 states and 24448 transitions. [2020-10-14 08:31:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:01,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-10-14 08:31:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:01,911 INFO L225 Difference]: With dead ends: 16090 [2020-10-14 08:31:01,911 INFO L226 Difference]: Without dead ends: 10667 [2020-10-14 08:31:01,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:31:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10667 states. [2020-10-14 08:31:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10667 to 10659. [2020-10-14 08:31:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10659 states. [2020-10-14 08:31:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 16087 transitions. [2020-10-14 08:31:02,476 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 16087 transitions. Word has length 318 [2020-10-14 08:31:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:02,476 INFO L479 AbstractCegarLoop]: Abstraction has 10659 states and 16087 transitions. [2020-10-14 08:31:02,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:31:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 16087 transitions. [2020-10-14 08:31:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-14 08:31:02,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:02,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:02,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:31:02,507 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash 184728785, now seen corresponding path program 1 times [2020-10-14 08:31:02,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:02,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662832800] [2020-10-14 08:31:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:04,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:04,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:04,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:07,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 08:31:07,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 08:31:07,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:07,988 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:31:07,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:07,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:08,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:08,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:08,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:08,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:08,088 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 08:31:08,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662832800] [2020-10-14 08:31:08,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:08,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:08,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607374898] [2020-10-14 08:31:08,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:08,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:08,091 INFO L87 Difference]: Start difference. First operand 10659 states and 16087 transitions. Second operand 4 states. [2020-10-14 08:31:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:15,634 INFO L93 Difference]: Finished difference Result 30861 states and 46384 transitions. [2020-10-14 08:31:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:31:15,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-14 08:31:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:15,679 INFO L225 Difference]: With dead ends: 30861 [2020-10-14 08:31:15,679 INFO L226 Difference]: Without dead ends: 20783 [2020-10-14 08:31:15,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2020-10-14 08:31:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 20781. [2020-10-14 08:31:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20781 states. [2020-10-14 08:31:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20781 states to 20781 states and 31134 transitions. [2020-10-14 08:31:16,871 INFO L78 Accepts]: Start accepts. Automaton has 20781 states and 31134 transitions. Word has length 319 [2020-10-14 08:31:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:16,871 INFO L479 AbstractCegarLoop]: Abstraction has 20781 states and 31134 transitions. [2020-10-14 08:31:16,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20781 states and 31134 transitions. [2020-10-14 08:31:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 08:31:16,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:16,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:16,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:31:16,914 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash 139182138, now seen corresponding path program 1 times [2020-10-14 08:31:16,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:16,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053804587] [2020-10-14 08:31:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:20,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:20,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 08:31:22,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 08:31:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 08:31:22,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:22,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:31:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:31:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-14 08:31:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:22,597 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:31:22,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:22,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:22,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:22,721 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 08:31:22,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053804587] [2020-10-14 08:31:22,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:22,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:31:22,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011715641] [2020-10-14 08:31:22,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:31:22,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:31:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:31:22,724 INFO L87 Difference]: Start difference. First operand 20781 states and 31134 transitions. Second operand 5 states. [2020-10-14 08:31:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:29,845 INFO L93 Difference]: Finished difference Result 43783 states and 65566 transitions. [2020-10-14 08:31:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:31:29,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2020-10-14 08:31:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:29,892 INFO L225 Difference]: With dead ends: 43783 [2020-10-14 08:31:29,893 INFO L226 Difference]: Without dead ends: 23201 [2020-10-14 08:31:29,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:31:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2020-10-14 08:31:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 20512. [2020-10-14 08:31:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20512 states. [2020-10-14 08:31:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 30616 transitions. [2020-10-14 08:31:31,745 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 30616 transitions. Word has length 320 [2020-10-14 08:31:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:31,746 INFO L479 AbstractCegarLoop]: Abstraction has 20512 states and 30616 transitions. [2020-10-14 08:31:31,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:31:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 30616 transitions. [2020-10-14 08:31:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 08:31:31,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:31,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:31,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:31:31,780 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash 263698790, now seen corresponding path program 1 times [2020-10-14 08:31:31,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:31,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722010534] [2020-10-14 08:31:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:33,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:34,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:36,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:36,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-14 08:31:36,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 08:31:36,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:31:36,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:37,237 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:31:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:37,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:37,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:37,304 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 08:31:37,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722010534] [2020-10-14 08:31:37,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:37,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:37,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571847474] [2020-10-14 08:31:37,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:37,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:37,306 INFO L87 Difference]: Start difference. First operand 20512 states and 30616 transitions. Second operand 4 states. [2020-10-14 08:31:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:42,699 INFO L93 Difference]: Finished difference Result 60919 states and 90835 transitions. [2020-10-14 08:31:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:31:42,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-14 08:31:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:42,774 INFO L225 Difference]: With dead ends: 60919 [2020-10-14 08:31:42,774 INFO L226 Difference]: Without dead ends: 40638 [2020-10-14 08:31:42,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40638 states. [2020-10-14 08:31:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40638 to 20570. [2020-10-14 08:31:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20570 states. [2020-10-14 08:31:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20570 states to 20570 states and 30692 transitions. [2020-10-14 08:31:44,000 INFO L78 Accepts]: Start accepts. Automaton has 20570 states and 30692 transitions. Word has length 322 [2020-10-14 08:31:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:44,000 INFO L479 AbstractCegarLoop]: Abstraction has 20570 states and 30692 transitions. [2020-10-14 08:31:44,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20570 states and 30692 transitions. [2020-10-14 08:31:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-14 08:31:44,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:44,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:44,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:31:44,021 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1539889085, now seen corresponding path program 1 times [2020-10-14 08:31:44,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:44,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810670217] [2020-10-14 08:31:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:49,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:49,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-14 08:31:49,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 08:31:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 08:31:49,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:49,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:31:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:31:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:31:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:49,509 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:31:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:31:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:31:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:31:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:31:49,578 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 08:31:49,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810670217] [2020-10-14 08:31:49,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:31:49,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:31:49,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467396868] [2020-10-14 08:31:49,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:31:49,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:31:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:31:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:49,579 INFO L87 Difference]: Start difference. First operand 20570 states and 30692 transitions. Second operand 4 states. [2020-10-14 08:31:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:31:55,154 INFO L93 Difference]: Finished difference Result 60912 states and 90774 transitions. [2020-10-14 08:31:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:31:55,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-14 08:31:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:31:55,223 INFO L225 Difference]: With dead ends: 60912 [2020-10-14 08:31:55,223 INFO L226 Difference]: Without dead ends: 40541 [2020-10-14 08:31:55,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:31:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40541 states. [2020-10-14 08:31:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40541 to 20669. [2020-10-14 08:31:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20669 states. [2020-10-14 08:31:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20669 states to 20669 states and 30831 transitions. [2020-10-14 08:31:56,446 INFO L78 Accepts]: Start accepts. Automaton has 20669 states and 30831 transitions. Word has length 323 [2020-10-14 08:31:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:31:56,447 INFO L479 AbstractCegarLoop]: Abstraction has 20669 states and 30831 transitions. [2020-10-14 08:31:56,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:31:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 20669 states and 30831 transitions. [2020-10-14 08:31:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 08:31:56,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:31:56,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:31:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:31:56,463 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:31:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:31:56,463 INFO L82 PathProgramCache]: Analyzing trace with hash 756565948, now seen corresponding path program 1 times [2020-10-14 08:31:56,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:31:56,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294679437] [2020-10-14 08:31:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:31:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:31:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:56,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:57,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:58,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:31:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:01,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:01,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:01,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:01,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:01,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 08:32:01,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 08:32:01,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 08:32:01,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:01,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:01,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:01,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:32:01,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-14 08:32:01,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:02,015 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:32:02,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:02,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:02,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:02,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:02,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:02,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:02,143 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 08:32:02,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294679437] [2020-10-14 08:32:02,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:02,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:02,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553118459] [2020-10-14 08:32:02,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:02,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:02,144 INFO L87 Difference]: Start difference. First operand 20669 states and 30831 transitions. Second operand 4 states. [2020-10-14 08:32:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:11,066 INFO L93 Difference]: Finished difference Result 59041 states and 87588 transitions. [2020-10-14 08:32:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:32:11,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-10-14 08:32:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:11,118 INFO L225 Difference]: With dead ends: 59041 [2020-10-14 08:32:11,118 INFO L226 Difference]: Without dead ends: 39999 [2020-10-14 08:32:11,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39999 states. [2020-10-14 08:32:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39999 to 39997. [2020-10-14 08:32:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39997 states. [2020-10-14 08:32:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39997 states to 39997 states and 59184 transitions. [2020-10-14 08:32:12,902 INFO L78 Accepts]: Start accepts. Automaton has 39997 states and 59184 transitions. Word has length 324 [2020-10-14 08:32:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:12,903 INFO L479 AbstractCegarLoop]: Abstraction has 39997 states and 59184 transitions. [2020-10-14 08:32:12,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 39997 states and 59184 transitions. [2020-10-14 08:32:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 08:32:12,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:12,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:32:12,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:32:12,940 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 119686937, now seen corresponding path program 1 times [2020-10-14 08:32:12,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:12,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105306112] [2020-10-14 08:32:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:13,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:13,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:13,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:18,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:32:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:32:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-14 08:32:18,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:18,709 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:32:18,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:18,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:18,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:18,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:18,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:32:18,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:18,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:18,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:18,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:18,871 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 08:32:18,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105306112] [2020-10-14 08:32:18,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:18,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:32:18,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25280746] [2020-10-14 08:32:18,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:32:18,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:32:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:32:18,872 INFO L87 Difference]: Start difference. First operand 39997 states and 59184 transitions. Second operand 5 states. [2020-10-14 08:32:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:29,052 INFO L93 Difference]: Finished difference Result 117203 states and 173108 transitions. [2020-10-14 08:32:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:32:29,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-10-14 08:32:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:29,145 INFO L225 Difference]: With dead ends: 117203 [2020-10-14 08:32:29,145 INFO L226 Difference]: Without dead ends: 78063 [2020-10-14 08:32:29,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:32:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78063 states. [2020-10-14 08:32:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78063 to 78061. [2020-10-14 08:32:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78061 states. [2020-10-14 08:32:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78061 states to 78061 states and 114568 transitions. [2020-10-14 08:32:33,227 INFO L78 Accepts]: Start accepts. Automaton has 78061 states and 114568 transitions. Word has length 324 [2020-10-14 08:32:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:33,228 INFO L479 AbstractCegarLoop]: Abstraction has 78061 states and 114568 transitions. [2020-10-14 08:32:33,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:32:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 78061 states and 114568 transitions. [2020-10-14 08:32:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-14 08:32:33,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:32:33,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:32:33,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:32:33,299 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:32:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:32:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1152924958, now seen corresponding path program 1 times [2020-10-14 08:32:33,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:32:33,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402548274] [2020-10-14 08:32:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:32:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:38,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:38,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-14 08:32:38,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:32:38,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 08:32:38,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:38,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:32:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 08:32:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 08:32:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:38,771 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:32:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:32:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:32:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:32:38,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:32:38,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:32:38,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:32:38,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:32:38,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:32:38,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:32:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:32:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:32:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:32:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:32:38,839 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 08:32:38,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402548274] [2020-10-14 08:32:38,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:32:38,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:32:38,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406679892] [2020-10-14 08:32:38,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:32:38,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:32:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:32:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:38,842 INFO L87 Difference]: Start difference. First operand 78061 states and 114568 transitions. Second operand 4 states. [2020-10-14 08:32:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:32:53,559 INFO L93 Difference]: Finished difference Result 230139 states and 336961 transitions. [2020-10-14 08:32:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:32:53,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-14 08:32:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:32:53,707 INFO L225 Difference]: With dead ends: 230139 [2020-10-14 08:32:53,707 INFO L226 Difference]: Without dead ends: 153583 [2020-10-14 08:32:53,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:32:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153583 states. [2020-10-14 08:32:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153583 to 78061. [2020-10-14 08:32:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78061 states. [2020-10-14 08:32:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78061 states to 78061 states and 114532 transitions. [2020-10-14 08:32:59,969 INFO L78 Accepts]: Start accepts. Automaton has 78061 states and 114532 transitions. Word has length 325 [2020-10-14 08:32:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:32:59,969 INFO L479 AbstractCegarLoop]: Abstraction has 78061 states and 114532 transitions. [2020-10-14 08:32:59,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:32:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 78061 states and 114532 transitions. [2020-10-14 08:33:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-14 08:33:00,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:33:00,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:33:00,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:33:00,024 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:33:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:33:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash -287580989, now seen corresponding path program 1 times [2020-10-14 08:33:00,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:33:00,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108195742] [2020-10-14 08:33:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:33:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:04,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:04,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:04,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:05,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:05,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-14 08:33:05,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 08:33:05,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 08:33:05,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:05,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:33:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:33:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 08:33:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:05,553 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2020-10-14 08:33:05,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:33:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:33:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:33:05,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:33:05,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:33:05,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:33:05,659 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 08:33:05,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108195742] [2020-10-14 08:33:05,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:33:05,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:33:05,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363920071] [2020-10-14 08:33:05,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:33:05,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:33:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:33:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:33:05,660 INFO L87 Difference]: Start difference. First operand 78061 states and 114532 transitions. Second operand 4 states.