/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 04:07:47,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 04:07:47,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 04:07:47,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 04:07:47,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 04:07:47,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 04:07:47,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 04:07:47,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 04:07:47,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 04:07:47,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 04:07:47,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 04:07:47,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 04:07:47,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 04:07:47,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 04:07:47,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 04:07:47,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 04:07:47,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 04:07:47,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 04:07:47,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 04:07:47,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 04:07:47,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 04:07:47,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 04:07:47,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 04:07:47,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 04:07:47,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 04:07:47,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 04:07:47,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 04:07:47,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 04:07:47,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 04:07:47,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 04:07:47,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 04:07:47,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 04:07:47,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 04:07:47,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 04:07:47,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 04:07:47,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 04:07:47,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 04:07:47,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 04:07:47,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 04:07:47,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 04:07:47,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 04:07:47,947 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 [2020-10-15 04:07:47,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 04:07:47,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 04:07:47,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 04:07:47,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 04:07:47,994 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 04:07:47,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 04:07:47,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 04:07:47,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 04:07:47,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 04:07:47,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 04:07:47,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 04:07:47,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 04:07:47,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 04:07:47,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 04:07:47,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 04:07:47,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 04:07:47,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 04:07:47,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 04:07:47,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 04:07:47,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 04:07:47,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 04:07:47,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 04:07:47,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 04:07:48,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 04:07:48,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 04:07:48,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 04:07:48,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 04:07:48,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 04:07:48,345 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 04:07:48,346 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 04:07:48,347 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-15 04:07:48,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf238db9/30cf4591e4af40b4b02e8a45d59ad9e8/FLAGcd0fc0c95 [2020-10-15 04:07:49,098 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 04:07:49,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-15 04:07:49,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf238db9/30cf4591e4af40b4b02e8a45d59ad9e8/FLAGcd0fc0c95 [2020-10-15 04:07:49,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf238db9/30cf4591e4af40b4b02e8a45d59ad9e8 [2020-10-15 04:07:49,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 04:07:49,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 04:07:49,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 04:07:49,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 04:07:49,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 04:07:49,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:07:49" (1/1) ... [2020-10-15 04:07:49,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a52991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:49, skipping insertion in model container [2020-10-15 04:07:49,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:07:49" (1/1) ... [2020-10-15 04:07:49,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 04:07:49,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 04:07:50,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 04:07:50,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 04:07:51,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 04:07:51,054 INFO L208 MainTranslator]: Completed translation [2020-10-15 04:07:51,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51 WrapperNode [2020-10-15 04:07:51,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 04:07:51,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 04:07:51,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 04:07:51,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 04:07:51,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (1/1) ... [2020-10-15 04:07:51,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 04:07:51,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 04:07:51,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 04:07:51,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 04:07:51,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (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 [2020-10-15 04:07:51,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 04:07:51,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 04:07:51,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 04:07:51,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 04:07:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 04:07:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 04:07:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-15 04:07:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 04:07:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 04:07:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 04:07:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 04:07:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 04:07:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 04:07:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 04:07:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 04:07:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 04:07:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 04:07:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 04:07:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 04:07:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 04:07:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 04:07:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 04:07:54,110 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 04:07:54,110 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 04:07:54,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:07:54 BoogieIcfgContainer [2020-10-15 04:07:54,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 04:07:54,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 04:07:54,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 04:07:54,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 04:07:54,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:07:49" (1/3) ... [2020-10-15 04:07:54,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd17275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:07:54, skipping insertion in model container [2020-10-15 04:07:54,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:07:51" (2/3) ... [2020-10-15 04:07:54,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd17275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:07:54, skipping insertion in model container [2020-10-15 04:07:54,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:07:54" (3/3) ... [2020-10-15 04:07:54,129 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-15 04:07:54,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 04:07:54,149 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 04:07:54,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 04:07:54,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 04:07:54,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 04:07:54,192 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 04:07:54,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 04:07:54,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 04:07:54,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 04:07:54,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 04:07:54,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 04:07:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-10-15 04:07:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-15 04:07:54,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:07:54,257 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] [2020-10-15 04:07:54,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:07:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:07:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-10-15 04:07:54,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:07:54,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275852912] [2020-10-15 04:07:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:07:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:07:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:57,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:58,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:58,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:58,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:07:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:00,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:00,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-15 04:08:00,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 04:08:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-15 04:08:00,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:00,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:08:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-15 04:08:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-15 04:08:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 04:08:01,037 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:08:01,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:08:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:01,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:01,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:08:01,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:08:01,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-15 04:08:01,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:01,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:01,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:08:01,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:08:01,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:08:01,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:08:01,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275852912] [2020-10-15 04:08:01,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:08:01,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:08:01,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260368918] [2020-10-15 04:08:01,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:08:01,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:08:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:08:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:08:01,338 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-10-15 04:08:01,944 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-10-15 04:08:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:08:07,018 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-10-15 04:08:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:08:07,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-15 04:08:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:08:07,051 INFO L225 Difference]: With dead ends: 1515 [2020-10-15 04:08:07,051 INFO L226 Difference]: Without dead ends: 1299 [2020-10-15 04:08:07,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:08:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-10-15 04:08:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-10-15 04:08:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-10-15 04:08:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-10-15 04:08:07,188 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-10-15 04:08:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:08:07,189 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-10-15 04:08:07,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:08:07,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-10-15 04:08:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-15 04:08:07,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:08:07,200 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] [2020-10-15 04:08:07,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 04:08:07,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:08:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:08:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-10-15 04:08:07,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:08:07,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026407052] [2020-10-15 04:08:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:08:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:08,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:08,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:08,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:11,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:12,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:12,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-15 04:08:12,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 04:08:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-15 04:08:12,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:12,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:08:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-15 04:08:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-15 04:08:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:13,157 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:08:13,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:08:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:13,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:13,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:13,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:08:13,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:08:13,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-15 04:08:13,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:13,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:08:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:08:13,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:08:13,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:08:13,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026407052] [2020-10-15 04:08:13,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:08:13,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:08:13,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258935805] [2020-10-15 04:08:13,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:08:13,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:08:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:08:13,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:08:13,476 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-10-15 04:08:14,365 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-10-15 04:08:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:08:18,917 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-10-15 04:08:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:08:18,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-15 04:08:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:08:18,933 INFO L225 Difference]: With dead ends: 2671 [2020-10-15 04:08:18,933 INFO L226 Difference]: Without dead ends: 2289 [2020-10-15 04:08:18,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:08:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-10-15 04:08:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-10-15 04:08:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-10-15 04:08:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-10-15 04:08:19,018 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-10-15 04:08:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:08:19,020 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-10-15 04:08:19,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:08:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-10-15 04:08:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-15 04:08:19,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:08:19,028 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] [2020-10-15 04:08:19,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 04:08:19,029 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:08:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:08:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-10-15 04:08:19,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:08:19,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921717034] [2020-10-15 04:08:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:08:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:21,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:22,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:24,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:24,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-15 04:08:24,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 04:08:24,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-15 04:08:24,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:24,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:24,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:08:24,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-15 04:08:24,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-15 04:08:24,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:24,976 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:08:24,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:08:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:25,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:25,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:08:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:08:25,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-15 04:08:25,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:25,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:25,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:08:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:08:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:08:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:08:25,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921717034] [2020-10-15 04:08:25,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:08:25,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:08:25,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357481481] [2020-10-15 04:08:25,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:08:25,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:08:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:08:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:08:25,156 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-10-15 04:08:25,701 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-10-15 04:08:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:08:30,942 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-10-15 04:08:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:08:30,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-15 04:08:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:08:30,964 INFO L225 Difference]: With dead ends: 4943 [2020-10-15 04:08:30,964 INFO L226 Difference]: Without dead ends: 4229 [2020-10-15 04:08:30,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:08:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-10-15 04:08:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-10-15 04:08:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-10-15 04:08:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-10-15 04:08:31,112 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-10-15 04:08:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:08:31,112 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-10-15 04:08:31,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:08:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-10-15 04:08:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-15 04:08:31,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:08:31,123 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, 1, 1] [2020-10-15 04:08:31,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 04:08:31,124 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:08:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:08:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-10-15 04:08:31,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:08:31,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852784247] [2020-10-15 04:08:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:08:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:31,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:31,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:32,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:33,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:33,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:34,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:34,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:36,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:36,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-15 04:08:36,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 04:08:36,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-15 04:08:36,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:36,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:08:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-15 04:08:36,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-15 04:08:36,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:36,953 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:08:36,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:08:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:36,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:08:36,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:08:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 04:08:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:36,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:08:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:08:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:08:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:08:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:08:37,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852784247] [2020-10-15 04:08:37,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:08:37,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:08:37,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173111568] [2020-10-15 04:08:37,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:08:37,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:08:37,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:08:37,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:08:37,104 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-10-15 04:08:37,613 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-10-15 04:08:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:08:41,864 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-10-15 04:08:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:08:41,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-15 04:08:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:08:41,903 INFO L225 Difference]: With dead ends: 9359 [2020-10-15 04:08:41,903 INFO L226 Difference]: Without dead ends: 8029 [2020-10-15 04:08:41,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:08:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-10-15 04:08:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-10-15 04:08:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-10-15 04:08:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-10-15 04:08:42,147 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-10-15 04:08:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:08:42,148 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-10-15 04:08:42,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:08:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-10-15 04:08:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-15 04:08:42,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:08:42,169 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] [2020-10-15 04:08:42,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 04:08:42,170 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:08:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:08:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-10-15 04:08:42,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:08:42,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759268154] [2020-10-15 04:08:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:08:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:42,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:42,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:44,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:47,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:47,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-15 04:08:47,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 04:08:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-15 04:08:47,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:47,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 04:08:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 04:08:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-15 04:08:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:08:48,034 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:08:48,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:08:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:48,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:08:48,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:08:48,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:08:48,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 04:08:48,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:08:48,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:08:48,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:08:48,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:08:48,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:08:48,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:08:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:08:48,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759268154] [2020-10-15 04:08:48,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:08:48,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 04:08:48,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363222339] [2020-10-15 04:08:48,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 04:08:48,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:08:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 04:08:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:08:48,259 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-10-15 04:08:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:08:56,240 INFO L93 Difference]: Finished difference Result 23713 states and 36699 transitions. [2020-10-15 04:08:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:08:56,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-10-15 04:08:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:08:56,300 INFO L225 Difference]: With dead ends: 23713 [2020-10-15 04:08:56,301 INFO L226 Difference]: Without dead ends: 15725 [2020-10-15 04:08:56,317 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 [2020-10-15 04:08:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15725 states. [2020-10-15 04:08:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15725 to 15723. [2020-10-15 04:08:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15723 states. [2020-10-15 04:08:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15723 states to 15723 states and 24216 transitions. [2020-10-15 04:08:56,916 INFO L78 Accepts]: Start accepts. Automaton has 15723 states and 24216 transitions. Word has length 318 [2020-10-15 04:08:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:08:56,916 INFO L479 AbstractCegarLoop]: Abstraction has 15723 states and 24216 transitions. [2020-10-15 04:08:56,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 04:08:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15723 states and 24216 transitions. [2020-10-15 04:08:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-15 04:08:56,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:08:56,946 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] [2020-10-15 04:08:56,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 04:08:56,946 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:08:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:08:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash 493862517, now seen corresponding path program 1 times [2020-10-15 04:08:56,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:08:56,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426530368] [2020-10-15 04:08:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:08:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:08:57,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:57,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:08:59,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:02,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:02,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-15 04:09:02,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 04:09:02,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 04:09:02,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:02,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 04:09:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 04:09:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-15 04:09:02,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:09:02,611 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:09:02,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:09:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:02,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:09:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:09:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:09:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:09:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:09:02,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426530368] [2020-10-15 04:09:02,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:09:02,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 04:09:02,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275533618] [2020-10-15 04:09:02,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 04:09:02,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:09:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 04:09:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:09:02,821 INFO L87 Difference]: Start difference. First operand 15723 states and 24216 transitions. Second operand 5 states. [2020-10-15 04:09:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:09:10,140 INFO L93 Difference]: Finished difference Result 46526 states and 71572 transitions. [2020-10-15 04:09:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:09:10,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2020-10-15 04:09:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:09:10,207 INFO L225 Difference]: With dead ends: 46526 [2020-10-15 04:09:10,207 INFO L226 Difference]: Without dead ends: 30818 [2020-10-15 04:09:10,244 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 [2020-10-15 04:09:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30818 states. [2020-10-15 04:09:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30818 to 30816. [2020-10-15 04:09:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30816 states. [2020-10-15 04:09:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30816 states to 30816 states and 47163 transitions. [2020-10-15 04:09:11,217 INFO L78 Accepts]: Start accepts. Automaton has 30816 states and 47163 transitions. Word has length 320 [2020-10-15 04:09:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:09:11,217 INFO L479 AbstractCegarLoop]: Abstraction has 30816 states and 47163 transitions. [2020-10-15 04:09:11,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 04:09:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 30816 states and 47163 transitions. [2020-10-15 04:09:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-15 04:09:11,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:09:11,259 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] [2020-10-15 04:09:11,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 04:09:11,259 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:09:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:09:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2072155835, now seen corresponding path program 1 times [2020-10-15 04:09:11,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:09:11,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795234149] [2020-10-15 04:09:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:09:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:11,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:16,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:09:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 04:09:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-15 04:09:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:09:16,915 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:09:16,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:09:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:16,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:16,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:09:16,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:09:16,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 04:09:16,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:16,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:09:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:09:16,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:09:16,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:09:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:09:17,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795234149] [2020-10-15 04:09:17,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:09:17,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:09:17,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842866180] [2020-10-15 04:09:17,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:09:17,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:09:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:09:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:09:17,036 INFO L87 Difference]: Start difference. First operand 30816 states and 47163 transitions. Second operand 4 states. [2020-10-15 04:09:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:09:26,521 INFO L93 Difference]: Finished difference Result 90952 states and 138955 transitions. [2020-10-15 04:09:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 04:09:26,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-15 04:09:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:09:26,712 INFO L225 Difference]: With dead ends: 90952 [2020-10-15 04:09:26,713 INFO L226 Difference]: Without dead ends: 60330 [2020-10-15 04:09:26,797 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 [2020-10-15 04:09:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60330 states. [2020-10-15 04:09:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60330 to 60328. [2020-10-15 04:09:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60328 states. [2020-10-15 04:09:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60328 states to 60328 states and 91683 transitions. [2020-10-15 04:09:30,325 INFO L78 Accepts]: Start accepts. Automaton has 60328 states and 91683 transitions. Word has length 322 [2020-10-15 04:09:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:09:30,326 INFO L479 AbstractCegarLoop]: Abstraction has 60328 states and 91683 transitions. [2020-10-15 04:09:30,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:09:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60328 states and 91683 transitions. [2020-10-15 04:09:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-15 04:09:30,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:09:30,375 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] [2020-10-15 04:09:30,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 04:09:30,375 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:09:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:09:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1022256906, now seen corresponding path program 1 times [2020-10-15 04:09:30,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:09:30,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403707852] [2020-10-15 04:09:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:09:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:33,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:34,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:35,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:09:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 04:09:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-15 04:09:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:09:36,001 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:09:36,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:09:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:36,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:09:36,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:09:36,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:09:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:09:36,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403707852] [2020-10-15 04:09:36,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:09:36,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 04:09:36,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535032188] [2020-10-15 04:09:36,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 04:09:36,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:09:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 04:09:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:09:36,134 INFO L87 Difference]: Start difference. First operand 60328 states and 91683 transitions. Second operand 4 states. [2020-10-15 04:09:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:09:48,428 INFO L93 Difference]: Finished difference Result 178016 states and 270029 transitions. [2020-10-15 04:09:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 04:09:48,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-15 04:09:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:09:48,667 INFO L225 Difference]: With dead ends: 178016 [2020-10-15 04:09:48,667 INFO L226 Difference]: Without dead ends: 118170 [2020-10-15 04:09:48,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 04:09:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118170 states. [2020-10-15 04:09:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118170 to 118168. [2020-10-15 04:09:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118168 states. [2020-10-15 04:09:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118168 states to 118168 states and 178351 transitions. [2020-10-15 04:09:54,934 INFO L78 Accepts]: Start accepts. Automaton has 118168 states and 178351 transitions. Word has length 322 [2020-10-15 04:09:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:09:54,934 INFO L479 AbstractCegarLoop]: Abstraction has 118168 states and 178351 transitions. [2020-10-15 04:09:54,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 04:09:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 118168 states and 178351 transitions. [2020-10-15 04:09:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-15 04:09:55,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:09:55,046 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] [2020-10-15 04:09:55,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 04:09:55,046 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:09:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:09:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 896596559, now seen corresponding path program 1 times [2020-10-15 04:09:55,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:09:55,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810896237] [2020-10-15 04:09:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:09:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:09:55,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:55,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:55,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:55,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:56,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:09:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:00,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:10:00,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-15 04:10:00,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 04:10:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-15 04:10:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:10:01,064 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:10:01,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:10:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:10:01,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:01,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:10:01,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:10:01,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:10:01,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:10:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:10:01,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810896237] [2020-10-15 04:10:01,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:10:01,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 04:10:01,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911711602] [2020-10-15 04:10:01,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 04:10:01,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:10:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 04:10:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:10:01,202 INFO L87 Difference]: Start difference. First operand 118168 states and 178351 transitions. Second operand 5 states. [2020-10-15 04:10:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:10:18,493 INFO L93 Difference]: Finished difference Result 349308 states and 526345 transitions. [2020-10-15 04:10:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:10:18,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-10-15 04:10:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:10:18,755 INFO L225 Difference]: With dead ends: 349308 [2020-10-15 04:10:18,755 INFO L226 Difference]: Without dead ends: 231350 [2020-10-15 04:10:18,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 04:10:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231350 states. [2020-10-15 04:10:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231350 to 231348. [2020-10-15 04:10:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231348 states. [2020-10-15 04:10:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231348 states to 231348 states and 346694 transitions. [2020-10-15 04:10:30,240 INFO L78 Accepts]: Start accepts. Automaton has 231348 states and 346694 transitions. Word has length 322 [2020-10-15 04:10:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:10:30,240 INFO L479 AbstractCegarLoop]: Abstraction has 231348 states and 346694 transitions. [2020-10-15 04:10:30,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 04:10:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 231348 states and 346694 transitions. [2020-10-15 04:10:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-15 04:10:30,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:10:30,411 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] [2020-10-15 04:10:30,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 04:10:30,412 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:10:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:10:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash 858399065, now seen corresponding path program 1 times [2020-10-15 04:10:30,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:10:30,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933619359] [2020-10-15 04:10:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:10:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:10:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:32,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:36,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:10:36,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-15 04:10:36,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 04:10:36,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5603 [2020-10-15 04:10:36,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:10:36,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:10:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 04:10:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 04:10:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-15 04:10:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:10:36,666 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-15 04:10:36,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:10:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:10:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:10:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:10:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:10:36,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:10:36,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:10:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:10:36,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933619359] [2020-10-15 04:10:36,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 04:10:36,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 04:10:36,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210008642] [2020-10-15 04:10:36,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 04:10:36,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:10:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 04:10:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 04:10:36,789 INFO L87 Difference]: Start difference. First operand 231348 states and 346694 transitions. Second operand 5 states. [2020-10-15 04:11:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:11:00,190 INFO L93 Difference]: Finished difference Result 683686 states and 1022769 transitions. [2020-10-15 04:11:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 04:11:00,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-10-15 04:11:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:11:00,756 INFO L225 Difference]: With dead ends: 683686 [2020-10-15 04:11:00,756 INFO L226 Difference]: Without dead ends: 452836 [2020-10-15 04:11:00,905 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 [2020-10-15 04:11:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452836 states.