/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:21:51,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:21:51,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:21:51,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:21:51,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:21:51,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:21:51,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:21:51,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:21:51,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:21:51,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:21:51,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:21:51,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:21:51,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:21:51,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:21:51,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:21:51,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:21:51,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:21:51,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:21:51,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:21:51,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:21:51,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:21:51,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:21:51,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:21:51,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:21:51,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:21:51,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:21:51,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:21:51,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:21:51,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:21:51,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:21:51,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:21:51,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:21:51,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:21:51,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:21:51,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:21:51,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:21:51,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:21:51,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:21:51,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:21:51,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:21:51,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:21:51,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 08:21:51,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:21:51,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:21:51,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:21:51,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:21:51,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:21:51,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:21:51,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:21:51,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:21:51,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:21:51,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:21:51,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:21:51,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:21:51,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:21:51,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:21:51,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:21:51,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:21:51,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:21:51,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:21:51,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:21:51,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:21:51,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:21:51,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:21:51,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:21:51,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:21:51,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:21:51,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:21:51,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:21:51,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:21:51,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:21:51,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:21:51,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:21:51,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:21:51,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:21:51,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:21:51,766 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:21:51,766 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:21:51,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/861070f35/dae41212c1f145d6a477d36f04e3b0c2/FLAG365d553ae [2020-10-14 08:21:52,372 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:21:52,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:21:52,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/861070f35/dae41212c1f145d6a477d36f04e3b0c2/FLAG365d553ae [2020-10-14 08:21:52,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/861070f35/dae41212c1f145d6a477d36f04e3b0c2 [2020-10-14 08:21:52,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:21:52,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:21:52,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:21:52,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:21:52,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:21:52,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:21:52" (1/1) ... [2020-10-14 08:21:52,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d507481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:52, skipping insertion in model container [2020-10-14 08:21:52,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:21:52" (1/1) ... [2020-10-14 08:21:52,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:21:52,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:21:53,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:21:53,191 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:21:53,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:21:53,313 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:21:53,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53 WrapperNode [2020-10-14 08:21:53,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:21:53,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:21:53,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:21:53,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:21:53,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... [2020-10-14 08:21:53,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:21:53,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:21:53,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:21:53,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:21:53,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:21:53,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:21:53,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:21:53,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:21:53,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:21:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:21:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:21:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:21:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:21:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:21:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:21:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:21:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:21:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:21:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:21:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:21:54,244 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:21:54,244 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:21:54,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:21:54 BoogieIcfgContainer [2020-10-14 08:21:54,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:21:54,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:21:54,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:21:54,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:21:54,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:21:52" (1/3) ... [2020-10-14 08:21:54,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ca1714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:21:54, skipping insertion in model container [2020-10-14 08:21:54,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:21:53" (2/3) ... [2020-10-14 08:21:54,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ca1714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:21:54, skipping insertion in model container [2020-10-14 08:21:54,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:21:54" (3/3) ... [2020-10-14 08:21:54,259 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:21:54,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:21:54,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:21:54,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:21:54,312 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:21:54,312 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:21:54,312 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:21:54,313 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:21:54,313 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:21:54,313 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:21:54,313 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:21:54,313 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:21:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-14 08:21:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 08:21:54,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:54,346 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] [2020-10-14 08:21:54,346 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:54,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-14 08:21:54,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:54,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086163423] [2020-10-14 08:21:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:55,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:56,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:56,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 08:21:56,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:21:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-14 08:21:56,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:56,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:21:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:21:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:21:57,158 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:57,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:57,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:57,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:57,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:57,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:57,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:21:57,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:57,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:57,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:57,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086163423] [2020-10-14 08:21:57,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:57,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:57,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653893337] [2020-10-14 08:21:57,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:57,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:57,247 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-14 08:21:57,507 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:21:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:58,258 INFO L93 Difference]: Finished difference Result 297 states and 502 transitions. [2020-10-14 08:21:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:58,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-14 08:21:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:58,275 INFO L225 Difference]: With dead ends: 297 [2020-10-14 08:21:58,275 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 08:21:58,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 08:21:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-10-14 08:21:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 08:21:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 325 transitions. [2020-10-14 08:21:58,344 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 325 transitions. Word has length 61 [2020-10-14 08:21:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:58,345 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 325 transitions. [2020-10-14 08:21:58,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 325 transitions. [2020-10-14 08:21:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 08:21:58,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:58,349 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] [2020-10-14 08:21:58,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:21:58,349 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1858684161, now seen corresponding path program 1 times [2020-10-14 08:21:58,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:58,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768583812] [2020-10-14 08:21:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:58,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:02,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:02,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 08:22:02,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:22:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3913 [2020-10-14 08:22:02,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:02,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:22:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:22:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:02,512 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:02,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:02,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:02,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:02,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:02,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:22:02,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:02,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:02,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:02,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:02,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:02,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:02,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768583812] [2020-10-14 08:22:02,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:02,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:02,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982065105] [2020-10-14 08:22:02,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:02,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:02,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:02,552 INFO L87 Difference]: Start difference. First operand 205 states and 325 transitions. Second operand 4 states. [2020-10-14 08:22:02,785 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:22:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:03,422 INFO L93 Difference]: Finished difference Result 485 states and 797 transitions. [2020-10-14 08:22:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:03,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-14 08:22:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:03,427 INFO L225 Difference]: With dead ends: 485 [2020-10-14 08:22:03,427 INFO L226 Difference]: Without dead ends: 338 [2020-10-14 08:22:03,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-14 08:22:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-14 08:22:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-14 08:22:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 545 transitions. [2020-10-14 08:22:03,456 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 545 transitions. Word has length 63 [2020-10-14 08:22:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:03,456 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 545 transitions. [2020-10-14 08:22:03,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 545 transitions. [2020-10-14 08:22:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:22:03,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:03,460 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] [2020-10-14 08:22:03,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:22:03,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash 488010793, now seen corresponding path program 1 times [2020-10-14 08:22:03,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:03,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25030777] [2020-10-14 08:22:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:03,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:08,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:22:08,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:08,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 08:22:08,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:08,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:08,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:08,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:22:08,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:22:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:08,812 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:08,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:08,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:08,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:08,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:22:08,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:08,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:08,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25030777] [2020-10-14 08:22:08,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:08,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:08,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828303946] [2020-10-14 08:22:08,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:08,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:08,858 INFO L87 Difference]: Start difference. First operand 336 states and 545 transitions. Second operand 4 states. [2020-10-14 08:22:09,054 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:22:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:09,791 INFO L93 Difference]: Finished difference Result 816 states and 1351 transitions. [2020-10-14 08:22:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:09,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 08:22:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:09,798 INFO L225 Difference]: With dead ends: 816 [2020-10-14 08:22:09,799 INFO L226 Difference]: Without dead ends: 538 [2020-10-14 08:22:09,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-10-14 08:22:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2020-10-14 08:22:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-10-14 08:22:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 861 transitions. [2020-10-14 08:22:09,864 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 861 transitions. Word has length 65 [2020-10-14 08:22:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:09,865 INFO L479 AbstractCegarLoop]: Abstraction has 536 states and 861 transitions. [2020-10-14 08:22:09,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 861 transitions. [2020-10-14 08:22:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:22:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:09,875 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] [2020-10-14 08:22:09,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:22:09,876 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash -424133459, now seen corresponding path program 1 times [2020-10-14 08:22:09,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:09,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318042444] [2020-10-14 08:22:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:14,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:14,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:22:14,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:22:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 08:22:14,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:15,115 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:15,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:15,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:15,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:15,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:15,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:22:15,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:15,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:15,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:15,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:15,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318042444] [2020-10-14 08:22:15,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:15,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:15,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558076143] [2020-10-14 08:22:15,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:15,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:15,145 INFO L87 Difference]: Start difference. First operand 536 states and 861 transitions. Second operand 4 states. [2020-10-14 08:22:15,323 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:22:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:16,065 INFO L93 Difference]: Finished difference Result 991 states and 1613 transitions. [2020-10-14 08:22:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:16,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:22:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:16,072 INFO L225 Difference]: With dead ends: 991 [2020-10-14 08:22:16,072 INFO L226 Difference]: Without dead ends: 737 [2020-10-14 08:22:16,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-10-14 08:22:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2020-10-14 08:22:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-14 08:22:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1185 transitions. [2020-10-14 08:22:16,111 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1185 transitions. Word has length 67 [2020-10-14 08:22:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:16,112 INFO L479 AbstractCegarLoop]: Abstraction has 735 states and 1185 transitions. [2020-10-14 08:22:16,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1185 transitions. [2020-10-14 08:22:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:22:16,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:16,114 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] [2020-10-14 08:22:16,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:22:16,115 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1589480936, now seen corresponding path program 1 times [2020-10-14 08:22:16,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:16,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026752516] [2020-10-14 08:22:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:16,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:16,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:20,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:20,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:22:20,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:22:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-10-14 08:22:20,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:20,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:22:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:22:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:20,794 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:20,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:20,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:20,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:20,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:20,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:20,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:22:20,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:20,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:20,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026752516] [2020-10-14 08:22:20,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:20,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:20,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845173500] [2020-10-14 08:22:20,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:20,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:20,837 INFO L87 Difference]: Start difference. First operand 735 states and 1185 transitions. Second operand 4 states. [2020-10-14 08:22:21,105 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:22:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:21,947 INFO L93 Difference]: Finished difference Result 1660 states and 2717 transitions. [2020-10-14 08:22:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:21,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:22:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:21,955 INFO L225 Difference]: With dead ends: 1660 [2020-10-14 08:22:21,956 INFO L226 Difference]: Without dead ends: 998 [2020-10-14 08:22:21,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-10-14 08:22:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 996. [2020-10-14 08:22:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2020-10-14 08:22:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1622 transitions. [2020-10-14 08:22:22,025 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1622 transitions. Word has length 67 [2020-10-14 08:22:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:22,026 INFO L479 AbstractCegarLoop]: Abstraction has 996 states and 1622 transitions. [2020-10-14 08:22:22,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1622 transitions. [2020-10-14 08:22:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:22:22,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:22,027 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] [2020-10-14 08:22:22,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:22:22,028 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1413057439, now seen corresponding path program 1 times [2020-10-14 08:22:22,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:22,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877863189] [2020-10-14 08:22:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:23,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:27,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:27,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:27,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:22:27,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:22:27,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:27,331 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:27,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:22:27,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:27,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:27,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:27,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:27,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877863189] [2020-10-14 08:22:27,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:27,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:27,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672517547] [2020-10-14 08:22:27,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:27,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:27,380 INFO L87 Difference]: Start difference. First operand 996 states and 1622 transitions. Second operand 5 states. [2020-10-14 08:22:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:28,351 INFO L93 Difference]: Finished difference Result 2873 states and 4688 transitions. [2020-10-14 08:22:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:28,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-14 08:22:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:28,363 INFO L225 Difference]: With dead ends: 2873 [2020-10-14 08:22:28,363 INFO L226 Difference]: Without dead ends: 1902 [2020-10-14 08:22:28,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:22:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2020-10-14 08:22:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1900. [2020-10-14 08:22:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2020-10-14 08:22:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 3079 transitions. [2020-10-14 08:22:28,479 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 3079 transitions. Word has length 67 [2020-10-14 08:22:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:28,480 INFO L479 AbstractCegarLoop]: Abstraction has 1900 states and 3079 transitions. [2020-10-14 08:22:28,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 3079 transitions. [2020-10-14 08:22:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:22:28,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:28,482 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] [2020-10-14 08:22:28,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:22:28,483 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:28,483 INFO L82 PathProgramCache]: Analyzing trace with hash 865363584, now seen corresponding path program 1 times [2020-10-14 08:22:28,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:28,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431666136] [2020-10-14 08:22:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:28,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:30,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:33,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:33,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 08:22:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:33,709 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:33,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:33,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:33,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:33,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:22:33,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:33,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:33,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:33,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:33,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:22:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:33,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431666136] [2020-10-14 08:22:33,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:33,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:33,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596444421] [2020-10-14 08:22:33,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:33,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:33,749 INFO L87 Difference]: Start difference. First operand 1900 states and 3079 transitions. Second operand 4 states. [2020-10-14 08:22:33,984 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:22:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:34,782 INFO L93 Difference]: Finished difference Result 3514 states and 5764 transitions. [2020-10-14 08:22:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:34,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:22:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:34,801 INFO L225 Difference]: With dead ends: 3514 [2020-10-14 08:22:34,802 INFO L226 Difference]: Without dead ends: 2567 [2020-10-14 08:22:34,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2020-10-14 08:22:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2565. [2020-10-14 08:22:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2565 states. [2020-10-14 08:22:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4164 transitions. [2020-10-14 08:22:35,028 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4164 transitions. Word has length 67 [2020-10-14 08:22:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:35,029 INFO L479 AbstractCegarLoop]: Abstraction has 2565 states and 4164 transitions. [2020-10-14 08:22:35,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4164 transitions. [2020-10-14 08:22:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:22:35,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:35,031 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] [2020-10-14 08:22:35,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:22:35,032 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash -904568620, now seen corresponding path program 1 times [2020-10-14 08:22:35,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:35,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842223541] [2020-10-14 08:22:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:35,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:35,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:37,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:40,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:22:40,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:22:40,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:40,233 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:40,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:40,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:40,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:40,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:22:40,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:40,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:40,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842223541] [2020-10-14 08:22:40,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:40,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:40,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619326934] [2020-10-14 08:22:40,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:40,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:40,255 INFO L87 Difference]: Start difference. First operand 2565 states and 4164 transitions. Second operand 4 states. [2020-10-14 08:22:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:41,180 INFO L93 Difference]: Finished difference Result 7551 states and 12282 transitions. [2020-10-14 08:22:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:22:41,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 08:22:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:41,214 INFO L225 Difference]: With dead ends: 7551 [2020-10-14 08:22:41,215 INFO L226 Difference]: Without dead ends: 5089 [2020-10-14 08:22:41,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5089 states. [2020-10-14 08:22:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5089 to 2568. [2020-10-14 08:22:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-10-14 08:22:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4168 transitions. [2020-10-14 08:22:41,432 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4168 transitions. Word has length 68 [2020-10-14 08:22:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:41,432 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 4168 transitions. [2020-10-14 08:22:41,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4168 transitions. [2020-10-14 08:22:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:22:41,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:41,434 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] [2020-10-14 08:22:41,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:22:41,434 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1182974592, now seen corresponding path program 1 times [2020-10-14 08:22:41,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:41,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039512655] [2020-10-14 08:22:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:46,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:46,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:46,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:22:46,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:22:46,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:46,735 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:46,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:46,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:46,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:46,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:22:46,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:46,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:46,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:46,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039512655] [2020-10-14 08:22:46,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:46,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:46,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431695878] [2020-10-14 08:22:46,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:46,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:46,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:46,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:46,774 INFO L87 Difference]: Start difference. First operand 2568 states and 4168 transitions. Second operand 5 states. [2020-10-14 08:22:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:48,101 INFO L93 Difference]: Finished difference Result 7356 states and 11998 transitions. [2020-10-14 08:22:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:48,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-14 08:22:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:48,128 INFO L225 Difference]: With dead ends: 7356 [2020-10-14 08:22:48,128 INFO L226 Difference]: Without dead ends: 4947 [2020-10-14 08:22:48,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:22:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2020-10-14 08:22:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 4945. [2020-10-14 08:22:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4945 states. [2020-10-14 08:22:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 7985 transitions. [2020-10-14 08:22:48,479 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 7985 transitions. Word has length 69 [2020-10-14 08:22:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:48,479 INFO L479 AbstractCegarLoop]: Abstraction has 4945 states and 7985 transitions. [2020-10-14 08:22:48,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 7985 transitions. [2020-10-14 08:22:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:22:48,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:48,481 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] [2020-10-14 08:22:48,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:22:48,482 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash -492781771, now seen corresponding path program 1 times [2020-10-14 08:22:48,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:48,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248936336] [2020-10-14 08:22:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:48,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:52,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:53,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:22:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:22:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:53,688 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:53,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:53,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:53,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:53,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:53,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248936336] [2020-10-14 08:22:53,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:53,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:53,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956527783] [2020-10-14 08:22:53,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:53,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:53,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:53,711 INFO L87 Difference]: Start difference. First operand 4945 states and 7985 transitions. Second operand 4 states. [2020-10-14 08:22:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:54,676 INFO L93 Difference]: Finished difference Result 14753 states and 23819 transitions. [2020-10-14 08:22:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:22:54,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:22:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:54,727 INFO L225 Difference]: With dead ends: 14753 [2020-10-14 08:22:54,728 INFO L226 Difference]: Without dead ends: 9855 [2020-10-14 08:22:54,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2020-10-14 08:22:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 4957. [2020-10-14 08:22:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4957 states. [2020-10-14 08:22:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 8001 transitions. [2020-10-14 08:22:55,292 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 8001 transitions. Word has length 70 [2020-10-14 08:22:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:55,293 INFO L479 AbstractCegarLoop]: Abstraction has 4957 states and 8001 transitions. [2020-10-14 08:22:55,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 8001 transitions. [2020-10-14 08:22:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:22:55,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:55,294 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] [2020-10-14 08:22:55,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:22:55,295 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1550216662, now seen corresponding path program 1 times [2020-10-14 08:22:55,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:55,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450080270] [2020-10-14 08:22:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:55,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:55,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:57,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:00,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:00,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:23:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:23:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:00,500 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:00,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:00,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:00,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:00,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:00,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450080270] [2020-10-14 08:23:00,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:00,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:00,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964616758] [2020-10-14 08:23:00,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:00,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:00,527 INFO L87 Difference]: Start difference. First operand 4957 states and 8001 transitions. Second operand 4 states. [2020-10-14 08:23:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:01,830 INFO L93 Difference]: Finished difference Result 14357 states and 23263 transitions. [2020-10-14 08:23:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:23:01,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:23:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:01,855 INFO L225 Difference]: With dead ends: 14357 [2020-10-14 08:23:01,855 INFO L226 Difference]: Without dead ends: 9659 [2020-10-14 08:23:01,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2020-10-14 08:23:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9657. [2020-10-14 08:23:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9657 states. [2020-10-14 08:23:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9657 states to 9657 states and 15519 transitions. [2020-10-14 08:23:02,694 INFO L78 Accepts]: Start accepts. Automaton has 9657 states and 15519 transitions. Word has length 71 [2020-10-14 08:23:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:02,695 INFO L479 AbstractCegarLoop]: Abstraction has 9657 states and 15519 transitions. [2020-10-14 08:23:02,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9657 states and 15519 transitions. [2020-10-14 08:23:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:23:02,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:02,697 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] [2020-10-14 08:23:02,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:23:02,697 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash 341159213, now seen corresponding path program 1 times [2020-10-14 08:23:02,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:02,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833672470] [2020-10-14 08:23:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:02,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:03,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:07,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:23:07,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 08:23:07,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:07,954 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:07,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:07,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:07,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:07,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:07,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:07,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:07,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833672470] [2020-10-14 08:23:07,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:07,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:07,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554659734] [2020-10-14 08:23:07,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:07,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:07,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:07,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:07,988 INFO L87 Difference]: Start difference. First operand 9657 states and 15519 transitions. Second operand 5 states. [2020-10-14 08:23:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:09,961 INFO L93 Difference]: Finished difference Result 27741 states and 44791 transitions. [2020-10-14 08:23:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:09,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:23:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:10,007 INFO L225 Difference]: With dead ends: 27741 [2020-10-14 08:23:10,007 INFO L226 Difference]: Without dead ends: 18391 [2020-10-14 08:23:10,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18391 states. [2020-10-14 08:23:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18391 to 18389. [2020-10-14 08:23:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18389 states. [2020-10-14 08:23:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18389 states to 18389 states and 29447 transitions. [2020-10-14 08:23:11,154 INFO L78 Accepts]: Start accepts. Automaton has 18389 states and 29447 transitions. Word has length 71 [2020-10-14 08:23:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:11,154 INFO L479 AbstractCegarLoop]: Abstraction has 18389 states and 29447 transitions. [2020-10-14 08:23:11,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18389 states and 29447 transitions. [2020-10-14 08:23:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:23:11,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:11,157 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] [2020-10-14 08:23:11,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:23:11,157 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1570471009, now seen corresponding path program 1 times [2020-10-14 08:23:11,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:11,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493093295] [2020-10-14 08:23:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:16,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:16,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:23:16,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:23:16,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:16,554 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:16,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:16,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:16,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:23:16,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:16,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:16,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:16,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:16,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:16,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493093295] [2020-10-14 08:23:16,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:16,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:16,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785698273] [2020-10-14 08:23:16,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:16,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:16,578 INFO L87 Difference]: Start difference. First operand 18389 states and 29447 transitions. Second operand 5 states. [2020-10-14 08:23:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:18,759 INFO L93 Difference]: Finished difference Result 36630 states and 58697 transitions. [2020-10-14 08:23:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:18,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:23:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:18,796 INFO L225 Difference]: With dead ends: 36630 [2020-10-14 08:23:18,796 INFO L226 Difference]: Without dead ends: 18720 [2020-10-14 08:23:18,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18720 states. [2020-10-14 08:23:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18720 to 18586. [2020-10-14 08:23:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18586 states. [2020-10-14 08:23:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18586 states to 18586 states and 29680 transitions. [2020-10-14 08:23:20,337 INFO L78 Accepts]: Start accepts. Automaton has 18586 states and 29680 transitions. Word has length 71 [2020-10-14 08:23:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:20,338 INFO L479 AbstractCegarLoop]: Abstraction has 18586 states and 29680 transitions. [2020-10-14 08:23:20,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 18586 states and 29680 transitions. [2020-10-14 08:23:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:23:20,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:20,342 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] [2020-10-14 08:23:20,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:23:20,348 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 814614678, now seen corresponding path program 1 times [2020-10-14 08:23:20,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:20,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224781817] [2020-10-14 08:23:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:25,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:25,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:23:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:23:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:25,553 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:25,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:25,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:25,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:25,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:25,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224781817] [2020-10-14 08:23:25,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:25,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:25,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295742042] [2020-10-14 08:23:25,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:25,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:25,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:25,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:25,578 INFO L87 Difference]: Start difference. First operand 18586 states and 29680 transitions. Second operand 4 states. [2020-10-14 08:23:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:28,823 INFO L93 Difference]: Finished difference Result 55463 states and 88659 transitions. [2020-10-14 08:23:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:23:28,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-14 08:23:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:28,871 INFO L225 Difference]: With dead ends: 55463 [2020-10-14 08:23:28,872 INFO L226 Difference]: Without dead ends: 37136 [2020-10-14 08:23:28,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37136 states. [2020-10-14 08:23:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37136 to 18589. [2020-10-14 08:23:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18589 states. [2020-10-14 08:23:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18589 states to 18589 states and 29684 transitions. [2020-10-14 08:23:30,406 INFO L78 Accepts]: Start accepts. Automaton has 18589 states and 29684 transitions. Word has length 72 [2020-10-14 08:23:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:30,406 INFO L479 AbstractCegarLoop]: Abstraction has 18589 states and 29684 transitions. [2020-10-14 08:23:30,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18589 states and 29684 transitions. [2020-10-14 08:23:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:23:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:30,409 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] [2020-10-14 08:23:30,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:23:30,410 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1815120194, now seen corresponding path program 1 times [2020-10-14 08:23:30,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:30,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393200639] [2020-10-14 08:23:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:35,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:23:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:23:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:23:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:35,630 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:35,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:35,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:35,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:35,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:23:35,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:35,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:35,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:35,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393200639] [2020-10-14 08:23:35,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:35,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:23:35,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79192668] [2020-10-14 08:23:35,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:23:35,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:23:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:35,651 INFO L87 Difference]: Start difference. First operand 18589 states and 29684 transitions. Second operand 6 states. [2020-10-14 08:23:35,862 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 08:23:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:42,780 INFO L93 Difference]: Finished difference Result 104761 states and 170042 transitions. [2020-10-14 08:23:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:23:42,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 08:23:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:42,908 INFO L225 Difference]: With dead ends: 104761 [2020-10-14 08:23:42,908 INFO L226 Difference]: Without dead ends: 87191 [2020-10-14 08:23:42,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:23:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87191 states. [2020-10-14 08:23:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87191 to 35581. [2020-10-14 08:23:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35581 states. [2020-10-14 08:23:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35581 states to 35581 states and 56684 transitions. [2020-10-14 08:23:46,496 INFO L78 Accepts]: Start accepts. Automaton has 35581 states and 56684 transitions. Word has length 73 [2020-10-14 08:23:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:46,497 INFO L479 AbstractCegarLoop]: Abstraction has 35581 states and 56684 transitions. [2020-10-14 08:23:46,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:23:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35581 states and 56684 transitions. [2020-10-14 08:23:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 08:23:46,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:46,499 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] [2020-10-14 08:23:46,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:23:46,499 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash -495761630, now seen corresponding path program 1 times [2020-10-14 08:23:46,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:46,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155584057] [2020-10-14 08:23:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:46,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:46,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:51,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:23:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:23:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:51,702 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:51,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:51,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:51,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:51,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:51,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:51,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155584057] [2020-10-14 08:23:51,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:51,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654002437] [2020-10-14 08:23:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:51,724 INFO L87 Difference]: Start difference. First operand 35581 states and 56684 transitions. Second operand 5 states. [2020-10-14 08:23:51,927 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:24:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:01,158 INFO L93 Difference]: Finished difference Result 135315 states and 216719 transitions. [2020-10-14 08:24:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:24:01,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 08:24:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:01,307 INFO L225 Difference]: With dead ends: 135315 [2020-10-14 08:24:01,307 INFO L226 Difference]: Without dead ends: 100753 [2020-10-14 08:24:01,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:24:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100753 states. [2020-10-14 08:24:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100753 to 67893. [2020-10-14 08:24:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67893 states. [2020-10-14 08:24:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67893 states to 67893 states and 107620 transitions. [2020-10-14 08:24:08,894 INFO L78 Accepts]: Start accepts. Automaton has 67893 states and 107620 transitions. Word has length 74 [2020-10-14 08:24:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:08,894 INFO L479 AbstractCegarLoop]: Abstraction has 67893 states and 107620 transitions. [2020-10-14 08:24:08,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:24:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67893 states and 107620 transitions. [2020-10-14 08:24:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:24:08,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:08,897 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] [2020-10-14 08:24:08,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:24:08,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1754206213, now seen corresponding path program 1 times [2020-10-14 08:24:08,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:08,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290945237] [2020-10-14 08:24:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:08,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:09,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:13,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:24:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:14,096 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:24:14,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:14,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:14,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:24:14,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290945237] [2020-10-14 08:24:14,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:14,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:24:14,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862017555] [2020-10-14 08:24:14,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:24:14,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:24:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:14,120 INFO L87 Difference]: Start difference. First operand 67893 states and 107620 transitions. Second operand 5 states. [2020-10-14 08:24:14,316 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:24:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:27,419 INFO L93 Difference]: Finished difference Result 218275 states and 347807 transitions. [2020-10-14 08:24:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:24:27,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-14 08:24:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:29,810 INFO L225 Difference]: With dead ends: 218275 [2020-10-14 08:24:29,810 INFO L226 Difference]: Without dead ends: 151401 [2020-10-14 08:24:29,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:24:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151401 states. [2020-10-14 08:24:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151401 to 109117. [2020-10-14 08:24:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109117 states. [2020-10-14 08:24:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109117 states to 109117 states and 171884 transitions. [2020-10-14 08:24:39,527 INFO L78 Accepts]: Start accepts. Automaton has 109117 states and 171884 transitions. Word has length 75 [2020-10-14 08:24:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:39,527 INFO L479 AbstractCegarLoop]: Abstraction has 109117 states and 171884 transitions. [2020-10-14 08:24:39,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:24:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 109117 states and 171884 transitions. [2020-10-14 08:24:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:24:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:39,531 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] [2020-10-14 08:24:39,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:24:39,531 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1506676663, now seen corresponding path program 1 times [2020-10-14 08:24:39,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:39,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673487378] [2020-10-14 08:24:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:44,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:24:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:24:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:24:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:44,734 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:24:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:44,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:44,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:44,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:44,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:24:44,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673487378] [2020-10-14 08:24:44,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:44,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:24:44,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69086460] [2020-10-14 08:24:44,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:24:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:24:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:44,755 INFO L87 Difference]: Start difference. First operand 109117 states and 171884 transitions. Second operand 5 states. [2020-10-14 08:24:44,949 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:25:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:06,325 INFO L93 Difference]: Finished difference Result 344579 states and 544527 transitions. [2020-10-14 08:25:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:25:06,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 08:25:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:06,713 INFO L225 Difference]: With dead ends: 344579 [2020-10-14 08:25:06,714 INFO L226 Difference]: Without dead ends: 236481 [2020-10-14 08:25:06,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:25:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236481 states. [2020-10-14 08:25:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236481 to 171981. [2020-10-14 08:25:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171981 states. [2020-10-14 08:25:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171981 states to 171981 states and 268804 transitions. [2020-10-14 08:25:26,152 INFO L78 Accepts]: Start accepts. Automaton has 171981 states and 268804 transitions. Word has length 76 [2020-10-14 08:25:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:26,152 INFO L479 AbstractCegarLoop]: Abstraction has 171981 states and 268804 transitions. [2020-10-14 08:25:26,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:25:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 171981 states and 268804 transitions. [2020-10-14 08:25:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:25:26,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:26,156 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] [2020-10-14 08:25:26,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:25:26,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2001930023, now seen corresponding path program 1 times [2020-10-14 08:25:26,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:26,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817218381] [2020-10-14 08:25:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:26,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:31,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:31,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:25:31,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:31,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 08:25:31,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:31,401 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:25:31,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:31,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:31,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:31,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:31,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:25:31,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:31,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:31,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817218381] [2020-10-14 08:25:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:31,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:25:31,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364842315] [2020-10-14 08:25:31,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:25:31,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:25:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:25:31,433 INFO L87 Difference]: Start difference. First operand 171981 states and 268804 transitions. Second operand 6 states. [2020-10-14 08:25:31,661 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 168