/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:37:32,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:37:32,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:37:32,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:37:32,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:37:32,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:37:32,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:37:32,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:37:32,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:37:32,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:37:32,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:37:32,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:37:32,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:37:32,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:37:32,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:37:32,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:37:32,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:37:32,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:37:32,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:37:32,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:37:32,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:37:32,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:37:32,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:37:32,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:37:32,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:37:32,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:37:32,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:37:32,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:37:32,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:37:32,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:37:32,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:37:32,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:37:32,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:37:32,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:37:32,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:37:32,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:37:32,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:37:32,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:37:32,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:37:32,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:37:32,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:37:32,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 03:37:33,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:37:33,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:37:33,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:37:33,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:37:33,007 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:37:33,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:37:33,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:37:33,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:37:33,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:37:33,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:37:33,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:37:33,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:37:33,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:37:33,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:37:33,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:37:33,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:37:33,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:37:33,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:37:33,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:37:33,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:37:33,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:37:33,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:37:33,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:37:33,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:37:33,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:37:33,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:37:33,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:37:33,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:37:33,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:37:33,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:37:33,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:37:33,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:37:33,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:37:33,327 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:37:33,327 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:37:33,328 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:37:33,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b29f6e4b/d31755ca12a3401fa52b64e13386d39a/FLAG520ff26fa [2020-10-15 03:37:33,831 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:37:33,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:37:33,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b29f6e4b/d31755ca12a3401fa52b64e13386d39a/FLAG520ff26fa [2020-10-15 03:37:34,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b29f6e4b/d31755ca12a3401fa52b64e13386d39a [2020-10-15 03:37:34,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:37:34,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:37:34,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:37:34,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:37:34,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:37:34,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c05dbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34, skipping insertion in model container [2020-10-15 03:37:34,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:37:34,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:37:34,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:37:34,577 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:37:34,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:37:34,787 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:37:34,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34 WrapperNode [2020-10-15 03:37:34,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:37:34,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:37:34,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:37:34,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:37:34,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... [2020-10-15 03:37:34,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:37:34,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:37:34,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:37:34,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:37:34,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:37:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:37:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:37:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:37:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:37:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:37:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:37:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:37:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:37:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:37:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:37:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:37:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:37:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:37:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:37:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:37:35,537 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:37:35,538 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:37:35,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:37:35 BoogieIcfgContainer [2020-10-15 03:37:35,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:37:35,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:37:35,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:37:35,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:37:35,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:37:34" (1/3) ... [2020-10-15 03:37:35,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f302ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:37:35, skipping insertion in model container [2020-10-15 03:37:35,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:37:34" (2/3) ... [2020-10-15 03:37:35,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f302ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:37:35, skipping insertion in model container [2020-10-15 03:37:35,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:37:35" (3/3) ... [2020-10-15 03:37:35,561 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:37:35,574 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:37:35,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:37:35,604 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:37:35,638 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:37:35,638 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:37:35,638 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:37:35,639 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:37:35,639 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:37:35,639 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:37:35,639 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:37:35,639 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:37:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-15 03:37:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 03:37:35,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:35,680 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] [2020-10-15 03:37:35,680 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash 259136055, now seen corresponding path program 1 times [2020-10-15 03:37:35,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:35,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554939185] [2020-10-15 03:37:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:36,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:37,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:37,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 03:37:37,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:37:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-15 03:37:37,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:37,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:37:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:37:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:37:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:37:37,738 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:37:37,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:37,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:37,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:37,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:37:37,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:37,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:37,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:37,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:37,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:37,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554939185] [2020-10-15 03:37:37,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:37,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:37:37,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282471041] [2020-10-15 03:37:37,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:37:37,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:37:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:37,802 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 6 states. [2020-10-15 03:37:38,089 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-15 03:37:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:38,689 INFO L93 Difference]: Finished difference Result 354 states and 557 transitions. [2020-10-15 03:37:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:37:38,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-15 03:37:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:38,709 INFO L225 Difference]: With dead ends: 354 [2020-10-15 03:37:38,710 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 03:37:38,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:37:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 03:37:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2020-10-15 03:37:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 03:37:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 217 transitions. [2020-10-15 03:37:38,789 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 217 transitions. Word has length 41 [2020-10-15 03:37:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:38,790 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 217 transitions. [2020-10-15 03:37:38,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:37:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 217 transitions. [2020-10-15 03:37:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:37:38,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:38,793 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] [2020-10-15 03:37:38,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:37:38,793 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash -575249677, now seen corresponding path program 1 times [2020-10-15 03:37:38,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:38,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920629453] [2020-10-15 03:37:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:38,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:39,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:39,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:37:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:37:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-15 03:37:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:39,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:37:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 03:37:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:37:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:39,819 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:37:39,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:39,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:39,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:39,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:39,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:37:39,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:39,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:39,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920629453] [2020-10-15 03:37:39,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:39,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:37:39,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689175019] [2020-10-15 03:37:39,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:37:39,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:39,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:37:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:37:39,857 INFO L87 Difference]: Start difference. First operand 146 states and 217 transitions. Second operand 4 states. [2020-10-15 03:37:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:40,368 INFO L93 Difference]: Finished difference Result 358 states and 551 transitions. [2020-10-15 03:37:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:37:40,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-15 03:37:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:40,372 INFO L225 Difference]: With dead ends: 358 [2020-10-15 03:37:40,372 INFO L226 Difference]: Without dead ends: 236 [2020-10-15 03:37:40,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-15 03:37:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-10-15 03:37:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-15 03:37:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 355 transitions. [2020-10-15 03:37:40,397 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 355 transitions. Word has length 42 [2020-10-15 03:37:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:40,397 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 355 transitions. [2020-10-15 03:37:40,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:37:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 355 transitions. [2020-10-15 03:37:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:37:40,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:40,400 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] [2020-10-15 03:37:40,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:37:40,400 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 25520956, now seen corresponding path program 1 times [2020-10-15 03:37:40,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:40,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347802315] [2020-10-15 03:37:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:40,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:40,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:40,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:37:40,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:37:40,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-15 03:37:40,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:40,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:37:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-15 03:37:40,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 03:37:40,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:40,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:40,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:40,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:40,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:40,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:40,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:37:40,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:40,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:40,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347802315] [2020-10-15 03:37:40,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:40,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:37:40,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281245485] [2020-10-15 03:37:40,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:37:40,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:37:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:37:40,970 INFO L87 Difference]: Start difference. First operand 234 states and 355 transitions. Second operand 4 states. [2020-10-15 03:37:41,106 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-15 03:37:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:41,482 INFO L93 Difference]: Finished difference Result 590 states and 913 transitions. [2020-10-15 03:37:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:37:41,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-15 03:37:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:41,486 INFO L225 Difference]: With dead ends: 590 [2020-10-15 03:37:41,486 INFO L226 Difference]: Without dead ends: 380 [2020-10-15 03:37:41,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-15 03:37:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 378. [2020-10-15 03:37:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-15 03:37:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 577 transitions. [2020-10-15 03:37:41,521 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 577 transitions. Word has length 43 [2020-10-15 03:37:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:41,522 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 577 transitions. [2020-10-15 03:37:41,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:37:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 577 transitions. [2020-10-15 03:37:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:37:41,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:41,524 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] [2020-10-15 03:37:41,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:37:41,525 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash -591643660, now seen corresponding path program 1 times [2020-10-15 03:37:41,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:41,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385142969] [2020-10-15 03:37:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:41,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:41,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:37:41,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:37:41,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-15 03:37:41,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:41,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:41,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:37:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 03:37:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 03:37:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:37:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:42,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:42,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:42,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:42,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:37:42,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:42,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:42,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385142969] [2020-10-15 03:37:42,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:42,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:37:42,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777507301] [2020-10-15 03:37:42,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:37:42,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:37:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:37:42,027 INFO L87 Difference]: Start difference. First operand 378 states and 577 transitions. Second operand 4 states. [2020-10-15 03:37:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:42,454 INFO L93 Difference]: Finished difference Result 958 states and 1475 transitions. [2020-10-15 03:37:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:37:42,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-15 03:37:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:42,460 INFO L225 Difference]: With dead ends: 958 [2020-10-15 03:37:42,460 INFO L226 Difference]: Without dead ends: 604 [2020-10-15 03:37:42,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-15 03:37:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2020-10-15 03:37:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-15 03:37:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 913 transitions. [2020-10-15 03:37:42,504 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 913 transitions. Word has length 44 [2020-10-15 03:37:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:42,505 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 913 transitions. [2020-10-15 03:37:42,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:37:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 913 transitions. [2020-10-15 03:37:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 03:37:42,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:42,509 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] [2020-10-15 03:37:42,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:37:42,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1872551437, now seen corresponding path program 1 times [2020-10-15 03:37:42,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:42,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893816666] [2020-10-15 03:37:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:42,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:42,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:42,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 03:37:42,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:37:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-15 03:37:42,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:42,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:37:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:37:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 03:37:42,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:43,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:43,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:43,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:37:43,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:43,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:43,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893816666] [2020-10-15 03:37:43,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:43,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:37:43,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354613089] [2020-10-15 03:37:43,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:37:43,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:37:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:43,146 INFO L87 Difference]: Start difference. First operand 602 states and 913 transitions. Second operand 6 states. [2020-10-15 03:37:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:43,796 INFO L93 Difference]: Finished difference Result 2072 states and 3148 transitions. [2020-10-15 03:37:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:37:43,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-15 03:37:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:43,806 INFO L225 Difference]: With dead ends: 2072 [2020-10-15 03:37:43,806 INFO L226 Difference]: Without dead ends: 1494 [2020-10-15 03:37:43,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-10-15 03:37:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1490. [2020-10-15 03:37:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2020-10-15 03:37:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2241 transitions. [2020-10-15 03:37:43,948 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2241 transitions. Word has length 45 [2020-10-15 03:37:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:43,948 INFO L479 AbstractCegarLoop]: Abstraction has 1490 states and 2241 transitions. [2020-10-15 03:37:43,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:37:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2241 transitions. [2020-10-15 03:37:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 03:37:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:43,950 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] [2020-10-15 03:37:43,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:37:43,951 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2044768828, now seen corresponding path program 1 times [2020-10-15 03:37:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:43,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116485747] [2020-10-15 03:37:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:44,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:44,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 03:37:44,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:37:44,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-15 03:37:44,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:44,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:37:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:37:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:37:44,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:44,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:44,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:44,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:44,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:44,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:44,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-15 03:37:44,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:44,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:37:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:44,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:37:44,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:44,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116485747] [2020-10-15 03:37:44,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:44,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:37:44,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690283361] [2020-10-15 03:37:44,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:37:44,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:37:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:44,451 INFO L87 Difference]: Start difference. First operand 1490 states and 2241 transitions. Second operand 6 states. [2020-10-15 03:37:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:45,092 INFO L93 Difference]: Finished difference Result 4382 states and 6595 transitions. [2020-10-15 03:37:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:37:45,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-15 03:37:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:45,108 INFO L225 Difference]: With dead ends: 4382 [2020-10-15 03:37:45,108 INFO L226 Difference]: Without dead ends: 2916 [2020-10-15 03:37:45,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:37:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2020-10-15 03:37:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2914. [2020-10-15 03:37:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2914 states. [2020-10-15 03:37:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 4337 transitions. [2020-10-15 03:37:45,325 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 4337 transitions. Word has length 47 [2020-10-15 03:37:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:45,328 INFO L479 AbstractCegarLoop]: Abstraction has 2914 states and 4337 transitions. [2020-10-15 03:37:45,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:37:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 4337 transitions. [2020-10-15 03:37:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 03:37:45,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:45,333 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] [2020-10-15 03:37:45,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:37:45,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:45,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1230356833, now seen corresponding path program 1 times [2020-10-15 03:37:45,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:45,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709456339] [2020-10-15 03:37:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:45,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:45,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 03:37:45,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:45,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-15 03:37:45,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:45,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:45,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:37:45,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-15 03:37:45,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:37:45,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:37:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:45,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:45,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:45,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:37:45,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:45,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:45,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709456339] [2020-10-15 03:37:45,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:45,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:37:45,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293113312] [2020-10-15 03:37:45,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:37:45,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:37:45,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:45,667 INFO L87 Difference]: Start difference. First operand 2914 states and 4337 transitions. Second operand 5 states. [2020-10-15 03:37:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:46,478 INFO L93 Difference]: Finished difference Result 5996 states and 8842 transitions. [2020-10-15 03:37:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:37:46,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-15 03:37:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:46,508 INFO L225 Difference]: With dead ends: 5996 [2020-10-15 03:37:46,509 INFO L226 Difference]: Without dead ends: 5994 [2020-10-15 03:37:46,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5994 states. [2020-10-15 03:37:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5994 to 3106. [2020-10-15 03:37:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3106 states. [2020-10-15 03:37:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 4529 transitions. [2020-10-15 03:37:46,817 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 4529 transitions. Word has length 47 [2020-10-15 03:37:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:46,817 INFO L479 AbstractCegarLoop]: Abstraction has 3106 states and 4529 transitions. [2020-10-15 03:37:46,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:37:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 4529 transitions. [2020-10-15 03:37:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 03:37:46,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:46,818 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] [2020-10-15 03:37:46,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:37:46,819 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash -504024136, now seen corresponding path program 1 times [2020-10-15 03:37:46,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:46,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084581250] [2020-10-15 03:37:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:46,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:46,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 03:37:46,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-15 03:37:46,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:46,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:37:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:37:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 03:37:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:37:47,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:47,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:47,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:47,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:37:47,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:47,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:37:47,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084581250] [2020-10-15 03:37:47,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:37:47,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:37:47,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091488221] [2020-10-15 03:37:47,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:37:47,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:37:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:37:47,118 INFO L87 Difference]: Start difference. First operand 3106 states and 4529 transitions. Second operand 4 states. [2020-10-15 03:37:47,245 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-15 03:37:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:47,825 INFO L93 Difference]: Finished difference Result 6860 states and 9989 transitions. [2020-10-15 03:37:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:37:47,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-15 03:37:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:47,850 INFO L225 Difference]: With dead ends: 6860 [2020-10-15 03:37:47,850 INFO L226 Difference]: Without dead ends: 3778 [2020-10-15 03:37:47,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2020-10-15 03:37:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3776. [2020-10-15 03:37:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3776 states. [2020-10-15 03:37:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 5463 transitions. [2020-10-15 03:37:48,246 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 5463 transitions. Word has length 48 [2020-10-15 03:37:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:48,246 INFO L479 AbstractCegarLoop]: Abstraction has 3776 states and 5463 transitions. [2020-10-15 03:37:48,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:37:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 5463 transitions. [2020-10-15 03:37:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 03:37:48,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:48,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:37:48,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:37:48,250 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1168690267, now seen corresponding path program 1 times [2020-10-15 03:37:48,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:48,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236539927] [2020-10-15 03:37:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:50,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:50,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 03:37:50,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:37:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-10-15 03:37:50,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:50,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:37:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:37:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:37:50,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:37:50,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:50,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:50,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:50,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:37:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:50,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:37:50,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236539927] [2020-10-15 03:37:50,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:37:50,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 03:37:50,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174668340] [2020-10-15 03:37:50,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:37:50,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:37:50,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:37:50,287 INFO L87 Difference]: Start difference. First operand 3776 states and 5463 transitions. Second operand 5 states. [2020-10-15 03:37:50,435 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-15 03:37:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:51,557 INFO L93 Difference]: Finished difference Result 9430 states and 13662 transitions. [2020-10-15 03:37:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:37:51,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-15 03:37:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:51,591 INFO L225 Difference]: With dead ends: 9430 [2020-10-15 03:37:51,591 INFO L226 Difference]: Without dead ends: 6348 [2020-10-15 03:37:51,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2020-10-15 03:37:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6344. [2020-10-15 03:37:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6344 states. [2020-10-15 03:37:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 9067 transitions. [2020-10-15 03:37:52,117 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 9067 transitions. Word has length 65 [2020-10-15 03:37:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:52,117 INFO L479 AbstractCegarLoop]: Abstraction has 6344 states and 9067 transitions. [2020-10-15 03:37:52,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:37:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 9067 transitions. [2020-10-15 03:37:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:37:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:52,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:37:52,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:37:52,122 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1398690500, now seen corresponding path program 1 times [2020-10-15 03:37:52,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:52,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168143123] [2020-10-15 03:37:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:52,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:52,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:52,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:52,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:57,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:57,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:37:57,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:37:57,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:37:57,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:57,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:57,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:37:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:37:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:37:57,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:57,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:37:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:57,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:37:57,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:37:57,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:37:57,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:37:57,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:37:57,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:37:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:37:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:37:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:37:57,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:37:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:37:57,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168143123] [2020-10-15 03:37:57,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:37:57,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:37:57,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700202108] [2020-10-15 03:37:57,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:37:57,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:37:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:37:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:37:57,292 INFO L87 Difference]: Start difference. First operand 6344 states and 9067 transitions. Second operand 6 states. [2020-10-15 03:37:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:37:58,688 INFO L93 Difference]: Finished difference Result 15261 states and 22111 transitions. [2020-10-15 03:37:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:37:58,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-15 03:37:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:37:58,768 INFO L225 Difference]: With dead ends: 15261 [2020-10-15 03:37:58,768 INFO L226 Difference]: Without dead ends: 12291 [2020-10-15 03:37:58,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:37:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12291 states. [2020-10-15 03:37:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12291 to 9904. [2020-10-15 03:37:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9904 states. [2020-10-15 03:37:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9904 states to 9904 states and 14163 transitions. [2020-10-15 03:37:59,779 INFO L78 Accepts]: Start accepts. Automaton has 9904 states and 14163 transitions. Word has length 66 [2020-10-15 03:37:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:37:59,780 INFO L479 AbstractCegarLoop]: Abstraction has 9904 states and 14163 transitions. [2020-10-15 03:37:59,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:37:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 9904 states and 14163 transitions. [2020-10-15 03:37:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:37:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:37:59,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:37:59,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:37:59,784 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:37:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:37:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -79760349, now seen corresponding path program 1 times [2020-10-15 03:37:59,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:37:59,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251921744] [2020-10-15 03:37:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:37:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:37:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:37:59,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:00,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:00,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:00,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:38:00,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:38:00,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-15 03:38:00,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:00,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:00,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:38:00,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:38:00,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:38:00,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:00,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:01,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:01,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:01,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:38:01,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:01,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:38:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:01,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:38:01,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 03:38:01,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251921744] [2020-10-15 03:38:01,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:01,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:38:01,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814695199] [2020-10-15 03:38:01,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:38:01,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:38:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:38:01,024 INFO L87 Difference]: Start difference. First operand 9904 states and 14163 transitions. Second operand 6 states. [2020-10-15 03:38:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:02,333 INFO L93 Difference]: Finished difference Result 18166 states and 26041 transitions. [2020-10-15 03:38:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:38:02,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-15 03:38:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:02,372 INFO L225 Difference]: With dead ends: 18166 [2020-10-15 03:38:02,373 INFO L226 Difference]: Without dead ends: 13756 [2020-10-15 03:38:02,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:38:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13756 states. [2020-10-15 03:38:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13756 to 11418. [2020-10-15 03:38:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11418 states. [2020-10-15 03:38:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11418 states to 11418 states and 16299 transitions. [2020-10-15 03:38:03,252 INFO L78 Accepts]: Start accepts. Automaton has 11418 states and 16299 transitions. Word has length 66 [2020-10-15 03:38:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:03,252 INFO L479 AbstractCegarLoop]: Abstraction has 11418 states and 16299 transitions. [2020-10-15 03:38:03,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:38:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 11418 states and 16299 transitions. [2020-10-15 03:38:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:38:03,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:03,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:03,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:38:03,261 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -566596180, now seen corresponding path program 1 times [2020-10-15 03:38:03,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:03,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23419638] [2020-10-15 03:38:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:04,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:05,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:08,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:08,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:38:08,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:38:08,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:38:08,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:08,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:38:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:38:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:38:08,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:08,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:08,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:38:08,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:08,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:38:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:38:08,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 03:38:08,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23419638] [2020-10-15 03:38:08,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:08,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:38:08,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525998738] [2020-10-15 03:38:08,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:38:08,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:38:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:38:08,492 INFO L87 Difference]: Start difference. First operand 11418 states and 16299 transitions. Second operand 6 states. [2020-10-15 03:38:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:09,848 INFO L93 Difference]: Finished difference Result 17255 states and 24634 transitions. [2020-10-15 03:38:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:38:09,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-15 03:38:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:09,876 INFO L225 Difference]: With dead ends: 17255 [2020-10-15 03:38:09,876 INFO L226 Difference]: Without dead ends: 14941 [2020-10-15 03:38:09,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:38:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14941 states. [2020-10-15 03:38:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14941 to 12616. [2020-10-15 03:38:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12616 states. [2020-10-15 03:38:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12616 states to 12616 states and 17999 transitions. [2020-10-15 03:38:10,595 INFO L78 Accepts]: Start accepts. Automaton has 12616 states and 17999 transitions. Word has length 66 [2020-10-15 03:38:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:10,596 INFO L479 AbstractCegarLoop]: Abstraction has 12616 states and 17999 transitions. [2020-10-15 03:38:10,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:38:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 12616 states and 17999 transitions. [2020-10-15 03:38:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:38:10,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:10,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:10,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:38:10,601 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash 73948117, now seen corresponding path program 1 times [2020-10-15 03:38:10,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:10,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142944991] [2020-10-15 03:38:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:10,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:10,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:10,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:11,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:15,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:38:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:38:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:38:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:15,792 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:38:15,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:15,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:15,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:15,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:15,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:38:15,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:15,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:38:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:38:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:38:15,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142944991] [2020-10-15 03:38:15,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:15,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:38:15,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680130740] [2020-10-15 03:38:15,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:38:15,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:38:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:38:15,838 INFO L87 Difference]: Start difference. First operand 12616 states and 17999 transitions. Second operand 8 states. [2020-10-15 03:38:15,990 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-15 03:38:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:17,416 INFO L93 Difference]: Finished difference Result 28941 states and 41061 transitions. [2020-10-15 03:38:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:38:17,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-15 03:38:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:17,450 INFO L225 Difference]: With dead ends: 28941 [2020-10-15 03:38:17,450 INFO L226 Difference]: Without dead ends: 18377 [2020-10-15 03:38:17,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:38:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18377 states. [2020-10-15 03:38:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18377 to 13042. [2020-10-15 03:38:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13042 states. [2020-10-15 03:38:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 18413 transitions. [2020-10-15 03:38:18,456 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 18413 transitions. Word has length 69 [2020-10-15 03:38:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:18,456 INFO L479 AbstractCegarLoop]: Abstraction has 13042 states and 18413 transitions. [2020-10-15 03:38:18,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:38:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 18413 transitions. [2020-10-15 03:38:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:38:18,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:18,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:18,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:38:18,460 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -52509793, now seen corresponding path program 1 times [2020-10-15 03:38:18,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:18,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616832264] [2020-10-15 03:38:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:18,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:18,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:20,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:20,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:38:20,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:38:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2242 [2020-10-15 03:38:20,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:20,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:38:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:38:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 03:38:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:20,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:20,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-15 03:38:20,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:20,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:38:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:20,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:38:20,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:38:21,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616832264] [2020-10-15 03:38:21,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:21,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:38:21,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595067431] [2020-10-15 03:38:21,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:38:21,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:21,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:38:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:38:21,037 INFO L87 Difference]: Start difference. First operand 13042 states and 18413 transitions. Second operand 8 states. [2020-10-15 03:38:21,194 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-15 03:38:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:23,866 INFO L93 Difference]: Finished difference Result 43529 states and 61249 transitions. [2020-10-15 03:38:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:38:23,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-15 03:38:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:23,917 INFO L225 Difference]: With dead ends: 43529 [2020-10-15 03:38:23,917 INFO L226 Difference]: Without dead ends: 30513 [2020-10-15 03:38:23,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:38:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30513 states. [2020-10-15 03:38:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30513 to 17168. [2020-10-15 03:38:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17168 states. [2020-10-15 03:38:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 23801 transitions. [2020-10-15 03:38:25,312 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 23801 transitions. Word has length 69 [2020-10-15 03:38:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:25,313 INFO L479 AbstractCegarLoop]: Abstraction has 17168 states and 23801 transitions. [2020-10-15 03:38:25,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:38:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 23801 transitions. [2020-10-15 03:38:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:38:25,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:25,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:25,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:38:25,317 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1326867344, now seen corresponding path program 1 times [2020-10-15 03:38:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947743567] [2020-10-15 03:38:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:25,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:25,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:28,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:30,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:30,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:38:30,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 03:38:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:30,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:30,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:30,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:30,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:30,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:38:30,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:30,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:38:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:38:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:38:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:38:30,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947743567] [2020-10-15 03:38:30,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:30,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:38:30,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038142913] [2020-10-15 03:38:30,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:38:30,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:38:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:38:30,534 INFO L87 Difference]: Start difference. First operand 17168 states and 23801 transitions. Second operand 8 states. [2020-10-15 03:38:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:34,381 INFO L93 Difference]: Finished difference Result 48555 states and 67288 transitions. [2020-10-15 03:38:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:38:34,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-15 03:38:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:34,439 INFO L225 Difference]: With dead ends: 48555 [2020-10-15 03:38:34,440 INFO L226 Difference]: Without dead ends: 40790 [2020-10-15 03:38:34,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:38:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40790 states. [2020-10-15 03:38:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40790 to 23212. [2020-10-15 03:38:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23212 states. [2020-10-15 03:38:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23212 states to 23212 states and 32436 transitions. [2020-10-15 03:38:37,246 INFO L78 Accepts]: Start accepts. Automaton has 23212 states and 32436 transitions. Word has length 69 [2020-10-15 03:38:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:37,246 INFO L479 AbstractCegarLoop]: Abstraction has 23212 states and 32436 transitions. [2020-10-15 03:38:37,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:38:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 23212 states and 32436 transitions. [2020-10-15 03:38:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:38:37,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:37,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:37,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:38:37,252 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 7360990, now seen corresponding path program 1 times [2020-10-15 03:38:37,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:37,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557543674] [2020-10-15 03:38:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:37,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:38,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:39,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:42,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:42,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:38:42,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 03:38:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 03:38:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:42,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:38:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:38:42,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 03:38:42,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:38:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:42,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:42,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:42,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:38:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:38:42,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557543674] [2020-10-15 03:38:42,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:42,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:38:42,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619490879] [2020-10-15 03:38:42,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:38:42,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:38:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:38:42,471 INFO L87 Difference]: Start difference. First operand 23212 states and 32436 transitions. Second operand 9 states. [2020-10-15 03:38:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:38:46,842 INFO L93 Difference]: Finished difference Result 66237 states and 91916 transitions. [2020-10-15 03:38:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 03:38:46,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-15 03:38:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:38:46,900 INFO L225 Difference]: With dead ends: 66237 [2020-10-15 03:38:46,900 INFO L226 Difference]: Without dead ends: 43051 [2020-10-15 03:38:46,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 03:38:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43051 states. [2020-10-15 03:38:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43051 to 23840. [2020-10-15 03:38:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23840 states. [2020-10-15 03:38:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23840 states to 23840 states and 32663 transitions. [2020-10-15 03:38:49,261 INFO L78 Accepts]: Start accepts. Automaton has 23840 states and 32663 transitions. Word has length 71 [2020-10-15 03:38:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:38:49,262 INFO L479 AbstractCegarLoop]: Abstraction has 23840 states and 32663 transitions. [2020-10-15 03:38:49,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:38:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 23840 states and 32663 transitions. [2020-10-15 03:38:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:38:49,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:38:49,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:38:49,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:38:49,268 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:38:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:38:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1857474947, now seen corresponding path program 1 times [2020-10-15 03:38:49,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:38:49,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005543515] [2020-10-15 03:38:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:38:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3500 [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:38:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:38:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 03:38:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:53,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:38:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:38:53,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:38:53,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:38:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:38:53,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:38:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:38:53,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:38:53,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:38:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:38:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:38:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:38:53,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:38:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:38:53,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005543515] [2020-10-15 03:38:53,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:38:53,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:38:53,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487768255] [2020-10-15 03:38:53,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:38:53,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:38:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:38:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:38:53,134 INFO L87 Difference]: Start difference. First operand 23840 states and 32663 transitions. Second operand 10 states. [2020-10-15 03:39:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:03,326 INFO L93 Difference]: Finished difference Result 102920 states and 140345 transitions. [2020-10-15 03:39:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 03:39:03,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-15 03:39:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:03,433 INFO L225 Difference]: With dead ends: 102920 [2020-10-15 03:39:03,433 INFO L226 Difference]: Without dead ends: 79106 [2020-10-15 03:39:03,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:39:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79106 states. [2020-10-15 03:39:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79106 to 45974. [2020-10-15 03:39:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45974 states. [2020-10-15 03:39:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45974 states to 45974 states and 62769 transitions. [2020-10-15 03:39:08,561 INFO L78 Accepts]: Start accepts. Automaton has 45974 states and 62769 transitions. Word has length 71 [2020-10-15 03:39:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:08,561 INFO L479 AbstractCegarLoop]: Abstraction has 45974 states and 62769 transitions. [2020-10-15 03:39:08,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:39:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 45974 states and 62769 transitions. [2020-10-15 03:39:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:39:08,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:08,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:08,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:39:08,566 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1383899537, now seen corresponding path program 1 times [2020-10-15 03:39:08,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:08,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179751661] [2020-10-15 03:39:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:08,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:10,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:10,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:39:10,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:39:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2072 [2020-10-15 03:39:10,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:10,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:39:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:39:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:39:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:10,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:10,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:10,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:10,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:10,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:10,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179751661] [2020-10-15 03:39:10,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:10,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:39:10,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053818978] [2020-10-15 03:39:10,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:39:10,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:39:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:39:10,929 INFO L87 Difference]: Start difference. First operand 45974 states and 62769 transitions. Second operand 10 states. [2020-10-15 03:39:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:34,568 INFO L93 Difference]: Finished difference Result 212218 states and 287840 transitions. [2020-10-15 03:39:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:39:34,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-15 03:39:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:34,818 INFO L225 Difference]: With dead ends: 212218 [2020-10-15 03:39:34,818 INFO L226 Difference]: Without dead ends: 171962 [2020-10-15 03:39:34,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:39:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171962 states. [2020-10-15 03:39:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171962 to 63912. [2020-10-15 03:39:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63912 states. [2020-10-15 03:39:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63912 states to 63912 states and 86830 transitions. [2020-10-15 03:39:46,629 INFO L78 Accepts]: Start accepts. Automaton has 63912 states and 86830 transitions. Word has length 71 [2020-10-15 03:39:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:46,629 INFO L479 AbstractCegarLoop]: Abstraction has 63912 states and 86830 transitions. [2020-10-15 03:39:46,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:39:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 63912 states and 86830 transitions. [2020-10-15 03:39:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 03:39:46,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:46,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:46,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:39:46,634 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1950277418, now seen corresponding path program 1 times [2020-10-15 03:39:46,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:46,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531112262] [2020-10-15 03:39:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:46,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:50,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4145 [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:50,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:39:50,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:39:50,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:39:50,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:51,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:51,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:51,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:51,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:51,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:39:51,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:51,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:39:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:51,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531112262] [2020-10-15 03:39:51,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:51,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:39:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783932207] [2020-10-15 03:39:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:39:51,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:51,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:39:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:39:51,035 INFO L87 Difference]: Start difference. First operand 63912 states and 86830 transitions. Second operand 9 states. [2020-10-15 03:40:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:40:14,943 INFO L93 Difference]: Finished difference Result 204256 states and 275533 transitions. [2020-10-15 03:40:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:40:14,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-15 03:40:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:40:15,130 INFO L225 Difference]: With dead ends: 204256 [2020-10-15 03:40:15,130 INFO L226 Difference]: Without dead ends: 140370 [2020-10-15 03:40:15,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 03:40:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140370 states. [2020-10-15 03:40:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140370 to 50425. [2020-10-15 03:40:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50425 states. [2020-10-15 03:40:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50425 states to 50425 states and 66932 transitions. [2020-10-15 03:40:23,412 INFO L78 Accepts]: Start accepts. Automaton has 50425 states and 66932 transitions. Word has length 72 [2020-10-15 03:40:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:40:23,412 INFO L479 AbstractCegarLoop]: Abstraction has 50425 states and 66932 transitions. [2020-10-15 03:40:23,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:40:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50425 states and 66932 transitions. [2020-10-15 03:40:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-15 03:40:23,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:40:23,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:40:23,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 03:40:23,426 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:40:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:40:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1149258227, now seen corresponding path program 1 times [2020-10-15 03:40:23,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:40:23,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133095398] [2020-10-15 03:40:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:40:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:24,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:25,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1846 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:40:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:40:25,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-15 03:40:25,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:40:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:25,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:25,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:40:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:40:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:40:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 03:40:25,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133095398] [2020-10-15 03:40:25,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:40:25,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:40:25,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173038513] [2020-10-15 03:40:25,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:40:25,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:40:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:40:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:40:25,448 INFO L87 Difference]: Start difference. First operand 50425 states and 66932 transitions. Second operand 6 states. [2020-10-15 03:40:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:40:36,229 INFO L93 Difference]: Finished difference Result 94678 states and 125206 transitions. [2020-10-15 03:40:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:40:36,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-15 03:40:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:40:36,302 INFO L225 Difference]: With dead ends: 94678 [2020-10-15 03:40:36,303 INFO L226 Difference]: Without dead ends: 64077 [2020-10-15 03:40:36,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:40:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64077 states. [2020-10-15 03:40:48,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64077 to 64073. [2020-10-15 03:40:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64073 states. [2020-10-15 03:40:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64073 states to 64073 states and 83447 transitions. [2020-10-15 03:40:48,472 INFO L78 Accepts]: Start accepts. Automaton has 64073 states and 83447 transitions. Word has length 103 [2020-10-15 03:40:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:40:48,472 INFO L479 AbstractCegarLoop]: Abstraction has 64073 states and 83447 transitions. [2020-10-15 03:40:48,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:40:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 64073 states and 83447 transitions. [2020-10-15 03:40:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 03:40:48,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:40:48,493 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:40:48,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 03:40:48,494 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:40:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:40:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1850882327, now seen corresponding path program 2 times [2020-10-15 03:40:48,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:40:48,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693533490] [2020-10-15 03:40:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:40:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:48,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:48,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:48,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:48,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:49,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:52,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:52,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 03:40:52,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:40:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4329 [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-15 03:40:52,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:52,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:40:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:53,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:53,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:40:53,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:40:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:40:53,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:53,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:40:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:40:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:40:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-15 03:40:53,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693533490] [2020-10-15 03:40:53,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:40:53,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:40:53,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279488628] [2020-10-15 03:40:53,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:40:53,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:40:53,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:40:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:40:53,024 INFO L87 Difference]: Start difference. First operand 64073 states and 83447 transitions. Second operand 6 states. [2020-10-15 03:41:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:41:08,997 INFO L93 Difference]: Finished difference Result 136297 states and 178917 transitions. [2020-10-15 03:41:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:41:08,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2020-10-15 03:41:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:41:09,117 INFO L225 Difference]: With dead ends: 136297 [2020-10-15 03:41:09,117 INFO L226 Difference]: Without dead ends: 97407 [2020-10-15 03:41:09,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:41:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97407 states.