/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:07:48,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:07:48,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:07:48,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:07:48,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:07:48,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:07:48,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:07:48,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:07:48,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:07:48,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:07:48,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:07:48,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:07:48,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:07:48,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:07:48,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:07:48,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:07:48,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:07:48,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:07:48,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:07:48,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:07:48,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:07:48,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:07:48,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:07:48,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:07:48,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:07:48,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:07:48,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:07:48,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:07:48,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:07:48,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:07:48,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:07:48,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:07:48,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:07:48,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:07:48,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:07:48,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:07:48,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:07:48,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:07:48,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:07:48,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:07:48,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:07:48,067 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 [2020-10-13 15:07:48,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:07:48,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:07:48,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:07:48,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:07:48,101 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:07:48,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:07:48,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:07:48,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:07:48,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:07:48,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:07:48,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:07:48,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:07:48,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:07:48,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:07:48,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:07:48,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:07:48,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:07:48,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:07:48,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:07:48,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:07:48,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:07:48,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:07:48,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:07:48,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:07:48,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:07:48,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:07:48,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:07:48,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:07:48,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:07:48,112 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:07:48,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:07:48,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:07:48,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:07:48,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:07:48,447 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:07:48,448 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:07:48,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d257e79f4/3473c28db78c4734800b0174e327595b/FLAG8ca8cc399 [2020-10-13 15:07:49,091 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:07:49,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:07:49,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d257e79f4/3473c28db78c4734800b0174e327595b/FLAG8ca8cc399 [2020-10-13 15:07:49,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d257e79f4/3473c28db78c4734800b0174e327595b [2020-10-13 15:07:49,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:07:49,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:07:49,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:07:49,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:07:49,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:07:49,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:07:49" (1/1) ... [2020-10-13 15:07:49,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:49, skipping insertion in model container [2020-10-13 15:07:49,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:07:49" (1/1) ... [2020-10-13 15:07:49,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:07:49,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:07:49,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:07:49,975 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:07:50,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:07:50,257 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:07:50,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50 WrapperNode [2020-10-13 15:07:50,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:07:50,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:07:50,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:07:50,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:07:50,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (1/1) ... [2020-10-13 15:07:50,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:07:50,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:07:50,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:07:50,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:07:50,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (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 [2020-10-13 15:07:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:07:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:07:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:07:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:07:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:07:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:07:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 15:07:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:07:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:07:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:07:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:07:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:07:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:07:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:07:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:07:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:07:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:07:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:07:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:07:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:07:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:07:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:07:51,847 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:07:51,847 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:07:51,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:07:51 BoogieIcfgContainer [2020-10-13 15:07:51,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:07:51,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:07:51,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:07:51,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:07:51,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:07:49" (1/3) ... [2020-10-13 15:07:51,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72292a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:07:51, skipping insertion in model container [2020-10-13 15:07:51,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:07:50" (2/3) ... [2020-10-13 15:07:51,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72292a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:07:51, skipping insertion in model container [2020-10-13 15:07:51,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:07:51" (3/3) ... [2020-10-13 15:07:51,864 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:07:51,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:07:51,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:07:51,898 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:07:51,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:07:51,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:07:51,926 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:07:51,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:07:51,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:07:51,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:07:51,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:07:51,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:07:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states. [2020-10-13 15:07:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 15:07:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:07:51,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:07:51,971 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:07:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:07:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash -273306171, now seen corresponding path program 1 times [2020-10-13 15:07:51,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:07:51,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708219609] [2020-10-13 15:07:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:07:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:52,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:54,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:57,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:57,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 15:07:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:07:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 15:07:57,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:07:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 15:07:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:07:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:07:58,294 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:07:58,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:07:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:07:58,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:07:58,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:07:58,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:07:58,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:07:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 15:07:58,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:07:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:07:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:07:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:07:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:07:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:07:58,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708219609] [2020-10-13 15:07:58,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:07:58,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:07:58,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096261854] [2020-10-13 15:07:58,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:07:58,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:07:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:07:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:07:58,477 INFO L87 Difference]: Start difference. First operand 356 states. Second operand 7 states. [2020-10-13 15:07:59,030 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2020-10-13 15:08:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:01,952 INFO L93 Difference]: Finished difference Result 1616 states and 2740 transitions. [2020-10-13 15:08:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:08:01,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-13 15:08:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:01,994 INFO L225 Difference]: With dead ends: 1616 [2020-10-13 15:08:01,994 INFO L226 Difference]: Without dead ends: 1437 [2020-10-13 15:08:02,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:08:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2020-10-13 15:08:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 505. [2020-10-13 15:08:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-13 15:08:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 836 transitions. [2020-10-13 15:08:02,120 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 836 transitions. Word has length 122 [2020-10-13 15:08:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:02,121 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 836 transitions. [2020-10-13 15:08:02,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:08:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 836 transitions. [2020-10-13 15:08:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 15:08:02,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:02,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:02,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:08:02,129 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash 51275037, now seen corresponding path program 1 times [2020-10-13 15:08:02,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:02,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839500121] [2020-10-13 15:08:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:02,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:03,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:07,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:07,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 15:08:07,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:07,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:08:07,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:08:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 15:08:07,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:08:07,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:07,763 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:07,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:07,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:07,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:07,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 15:08:07,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:07,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:07,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:07,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839500121] [2020-10-13 15:08:07,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:07,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 15:08:07,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697791725] [2020-10-13 15:08:07,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:08:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:08:07,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:08:07,860 INFO L87 Difference]: Start difference. First operand 505 states and 836 transitions. Second operand 8 states. [2020-10-13 15:08:08,327 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-10-13 15:08:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:11,764 INFO L93 Difference]: Finished difference Result 3779 states and 6321 transitions. [2020-10-13 15:08:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 15:08:11,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-10-13 15:08:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:11,787 INFO L225 Difference]: With dead ends: 3779 [2020-10-13 15:08:11,788 INFO L226 Difference]: Without dead ends: 3471 [2020-10-13 15:08:11,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-10-13 15:08:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2020-10-13 15:08:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 1348. [2020-10-13 15:08:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2020-10-13 15:08:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2249 transitions. [2020-10-13 15:08:11,950 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2249 transitions. Word has length 123 [2020-10-13 15:08:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:11,952 INFO L479 AbstractCegarLoop]: Abstraction has 1348 states and 2249 transitions. [2020-10-13 15:08:11,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:08:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2249 transitions. [2020-10-13 15:08:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 15:08:11,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:11,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:11,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:08:11,962 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:11,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1527915916, now seen corresponding path program 1 times [2020-10-13 15:08:11,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:11,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133178558] [2020-10-13 15:08:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:12,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:12,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:13,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:17,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 15:08:17,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 15:08:17,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:08:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 15:08:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:08:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:17,474 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:17,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:17,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:17,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:17,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:17,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:17,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 15:08:17,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:17,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133178558] [2020-10-13 15:08:17,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:17,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:08:17,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341188546] [2020-10-13 15:08:17,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:08:17,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:08:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:17,542 INFO L87 Difference]: Start difference. First operand 1348 states and 2249 transitions. Second operand 5 states. [2020-10-13 15:08:17,960 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:08:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:19,978 INFO L93 Difference]: Finished difference Result 4505 states and 7546 transitions. [2020-10-13 15:08:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:08:19,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-13 15:08:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:19,997 INFO L225 Difference]: With dead ends: 4505 [2020-10-13 15:08:19,998 INFO L226 Difference]: Without dead ends: 3469 [2020-10-13 15:08:20,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:08:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2020-10-13 15:08:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2424. [2020-10-13 15:08:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2424 states. [2020-10-13 15:08:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 4051 transitions. [2020-10-13 15:08:20,176 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 4051 transitions. Word has length 124 [2020-10-13 15:08:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:20,176 INFO L479 AbstractCegarLoop]: Abstraction has 2424 states and 4051 transitions. [2020-10-13 15:08:20,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:08:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 4051 transitions. [2020-10-13 15:08:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 15:08:20,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:20,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:20,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:08:20,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 63700932, now seen corresponding path program 1 times [2020-10-13 15:08:20,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:20,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492818143] [2020-10-13 15:08:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:20,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:21,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:21,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:25,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:25,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 15:08:25,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:25,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 15:08:25,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:25,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:08:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-13 15:08:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:08:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:25,701 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:25,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:25,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:25,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:25,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:25,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 15:08:25,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:25,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:08:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:25,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492818143] [2020-10-13 15:08:25,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:25,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:08:25,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992712018] [2020-10-13 15:08:25,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:08:25,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:08:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:25,797 INFO L87 Difference]: Start difference. First operand 2424 states and 4051 transitions. Second operand 5 states. [2020-10-13 15:08:26,363 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:08:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:28,399 INFO L93 Difference]: Finished difference Result 8643 states and 14474 transitions. [2020-10-13 15:08:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:08:28,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-13 15:08:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:28,432 INFO L225 Difference]: With dead ends: 8643 [2020-10-13 15:08:28,433 INFO L226 Difference]: Without dead ends: 6580 [2020-10-13 15:08:28,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:08:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2020-10-13 15:08:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 4501. [2020-10-13 15:08:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2020-10-13 15:08:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 7523 transitions. [2020-10-13 15:08:28,722 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 7523 transitions. Word has length 125 [2020-10-13 15:08:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:28,722 INFO L479 AbstractCegarLoop]: Abstraction has 4501 states and 7523 transitions. [2020-10-13 15:08:28,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:08:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 7523 transitions. [2020-10-13 15:08:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:08:28,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:28,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:28,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:08:28,727 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1922234707, now seen corresponding path program 1 times [2020-10-13 15:08:28,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:28,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388146624] [2020-10-13 15:08:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:33,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:33,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:08:33,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:33,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 15:08:33,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:08:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 15:08:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:08:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:34,257 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:34,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:34,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:34,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:34,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:34,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:34,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:08:34,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:34,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:34,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388146624] [2020-10-13 15:08:34,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:34,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:08:34,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638711652] [2020-10-13 15:08:34,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:08:34,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:08:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:34,327 INFO L87 Difference]: Start difference. First operand 4501 states and 7523 transitions. Second operand 5 states. [2020-10-13 15:08:34,755 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:08:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:36,695 INFO L93 Difference]: Finished difference Result 16831 states and 28154 transitions. [2020-10-13 15:08:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:08:36,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-13 15:08:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:36,762 INFO L225 Difference]: With dead ends: 16831 [2020-10-13 15:08:36,762 INFO L226 Difference]: Without dead ends: 12721 [2020-10-13 15:08:36,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:08:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2020-10-13 15:08:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 8581. [2020-10-13 15:08:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8581 states. [2020-10-13 15:08:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 14327 transitions. [2020-10-13 15:08:37,390 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 14327 transitions. Word has length 126 [2020-10-13 15:08:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:37,390 INFO L479 AbstractCegarLoop]: Abstraction has 8581 states and 14327 transitions. [2020-10-13 15:08:37,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:08:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 14327 transitions. [2020-10-13 15:08:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 15:08:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:37,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:37,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:08:37,394 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1058012029, now seen corresponding path program 1 times [2020-10-13 15:08:37,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:37,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531795320] [2020-10-13 15:08:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:37,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:41,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:41,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 15:08:41,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:41,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3587 [2020-10-13 15:08:41,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:08:41,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-13 15:08:41,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:08:41,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:41,415 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:41,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:41,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:41,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:41,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 15:08:41,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:41,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531795320] [2020-10-13 15:08:41,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:41,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:08:41,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332158271] [2020-10-13 15:08:41,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:08:41,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:08:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:08:41,496 INFO L87 Difference]: Start difference. First operand 8581 states and 14327 transitions. Second operand 4 states. [2020-10-13 15:08:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:43,944 INFO L93 Difference]: Finished difference Result 23372 states and 38901 transitions. [2020-10-13 15:08:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:08:43,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-13 15:08:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:43,988 INFO L225 Difference]: With dead ends: 23372 [2020-10-13 15:08:43,988 INFO L226 Difference]: Without dead ends: 15182 [2020-10-13 15:08:44,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:08:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15182 states. [2020-10-13 15:08:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15182 to 15067. [2020-10-13 15:08:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15067 states. [2020-10-13 15:08:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15067 states to 15067 states and 24898 transitions. [2020-10-13 15:08:44,932 INFO L78 Accepts]: Start accepts. Automaton has 15067 states and 24898 transitions. Word has length 128 [2020-10-13 15:08:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:44,933 INFO L479 AbstractCegarLoop]: Abstraction has 15067 states and 24898 transitions. [2020-10-13 15:08:44,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:08:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15067 states and 24898 transitions. [2020-10-13 15:08:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:08:44,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:44,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:44,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:08:44,937 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash -146117589, now seen corresponding path program 1 times [2020-10-13 15:08:44,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:44,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367766981] [2020-10-13 15:08:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:45,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:45,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:49,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:08:49,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:50,437 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:08:50,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:08:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:50,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:50,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:08:50,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:08:50,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:08:50,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:08:50,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:08:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:08:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:08:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:08:50,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:08:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:08:50,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367766981] [2020-10-13 15:08:50,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:08:50,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:08:50,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739863469] [2020-10-13 15:08:50,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:08:50,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:08:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:08:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:08:50,492 INFO L87 Difference]: Start difference. First operand 15067 states and 24898 transitions. Second operand 4 states. [2020-10-13 15:08:50,866 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:08:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:08:53,959 INFO L93 Difference]: Finished difference Result 38984 states and 64426 transitions. [2020-10-13 15:08:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:08:53,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-13 15:08:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:08:54,025 INFO L225 Difference]: With dead ends: 38984 [2020-10-13 15:08:54,026 INFO L226 Difference]: Without dead ends: 24298 [2020-10-13 15:08:54,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:08:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24298 states. [2020-10-13 15:08:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24298 to 24296. [2020-10-13 15:08:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24296 states. [2020-10-13 15:08:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24296 states to 24296 states and 40042 transitions. [2020-10-13 15:08:55,087 INFO L78 Accepts]: Start accepts. Automaton has 24296 states and 40042 transitions. Word has length 129 [2020-10-13 15:08:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:08:55,088 INFO L479 AbstractCegarLoop]: Abstraction has 24296 states and 40042 transitions. [2020-10-13 15:08:55,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:08:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24296 states and 40042 transitions. [2020-10-13 15:08:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:08:55,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:08:55,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:08:55,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:08:55,091 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:08:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:08:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash 501228186, now seen corresponding path program 1 times [2020-10-13 15:08:55,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:08:55,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194166109] [2020-10-13 15:08:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:08:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:08:55,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:08:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:00,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:00,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:09:00,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:09:00,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 15:09:00,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:00,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:09:00,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 15:09:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:09:00,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:09:00,554 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:09:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:00,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:00,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:00,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:00,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:09:00,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:00,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194166109] [2020-10-13 15:09:00,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:00,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:09:00,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807605246] [2020-10-13 15:09:00,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:09:00,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:09:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:00,606 INFO L87 Difference]: Start difference. First operand 24296 states and 40042 transitions. Second operand 5 states. [2020-10-13 15:09:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:04,497 INFO L93 Difference]: Finished difference Result 68720 states and 113036 transitions. [2020-10-13 15:09:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:04,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-13 15:09:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:04,594 INFO L225 Difference]: With dead ends: 68720 [2020-10-13 15:09:04,594 INFO L226 Difference]: Without dead ends: 44836 [2020-10-13 15:09:04,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44836 states. [2020-10-13 15:09:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44836 to 44450. [2020-10-13 15:09:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44450 states. [2020-10-13 15:09:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44450 states to 44450 states and 72710 transitions. [2020-10-13 15:09:06,774 INFO L78 Accepts]: Start accepts. Automaton has 44450 states and 72710 transitions. Word has length 129 [2020-10-13 15:09:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:06,775 INFO L479 AbstractCegarLoop]: Abstraction has 44450 states and 72710 transitions. [2020-10-13 15:09:06,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:09:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 44450 states and 72710 transitions. [2020-10-13 15:09:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:09:06,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:06,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:06,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:09:06,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1221630726, now seen corresponding path program 1 times [2020-10-13 15:09:06,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:06,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334159138] [2020-10-13 15:09:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:06,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:11,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:11,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:11,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:09:11,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:09:11,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 15:09:11,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-13 15:09:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:09:11,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:12,213 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:09:12,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:12,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:12,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334159138] [2020-10-13 15:09:12,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:12,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:12,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337084950] [2020-10-13 15:09:12,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:12,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:12,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:12,248 INFO L87 Difference]: Start difference. First operand 44450 states and 72710 transitions. Second operand 4 states. [2020-10-13 15:09:12,623 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:09:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:19,212 INFO L93 Difference]: Finished difference Result 123748 states and 202416 transitions. [2020-10-13 15:09:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:19,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-13 15:09:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:19,375 INFO L225 Difference]: With dead ends: 123748 [2020-10-13 15:09:19,375 INFO L226 Difference]: Without dead ends: 79562 [2020-10-13 15:09:19,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79562 states. [2020-10-13 15:09:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79562 to 79560. [2020-10-13 15:09:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79560 states. [2020-10-13 15:09:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79560 states to 79560 states and 129744 transitions. [2020-10-13 15:09:22,833 INFO L78 Accepts]: Start accepts. Automaton has 79560 states and 129744 transitions. Word has length 129 [2020-10-13 15:09:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:22,833 INFO L479 AbstractCegarLoop]: Abstraction has 79560 states and 129744 transitions. [2020-10-13 15:09:22,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:09:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 79560 states and 129744 transitions. [2020-10-13 15:09:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:09:22,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:22,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:22,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:09:22,835 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1257541698, now seen corresponding path program 1 times [2020-10-13 15:09:22,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:22,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706788920] [2020-10-13 15:09:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:23,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:23,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 15:09:27,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 15:09:27,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:28,240 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:09:28,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:28,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:28,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706788920] [2020-10-13 15:09:28,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:28,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:28,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931487606] [2020-10-13 15:09:28,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:28,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:28,278 INFO L87 Difference]: Start difference. First operand 79560 states and 129744 transitions. Second operand 4 states. [2020-10-13 15:09:28,660 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:09:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:38,280 INFO L93 Difference]: Finished difference Result 213736 states and 347300 transitions. [2020-10-13 15:09:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:38,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-13 15:09:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:38,500 INFO L225 Difference]: With dead ends: 213736 [2020-10-13 15:09:38,500 INFO L226 Difference]: Without dead ends: 134484 [2020-10-13 15:09:38,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:09:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134484 states. [2020-10-13 15:09:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134484 to 134482. [2020-10-13 15:09:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134482 states. [2020-10-13 15:09:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134482 states to 134482 states and 217280 transitions. [2020-10-13 15:09:47,217 INFO L78 Accepts]: Start accepts. Automaton has 134482 states and 217280 transitions. Word has length 129 [2020-10-13 15:09:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:09:47,218 INFO L479 AbstractCegarLoop]: Abstraction has 134482 states and 217280 transitions. [2020-10-13 15:09:47,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:09:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 134482 states and 217280 transitions. [2020-10-13 15:09:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:09:47,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:09:47,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:09:47,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:09:47,220 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:09:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:09:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash 320031638, now seen corresponding path program 1 times [2020-10-13 15:09:47,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:09:47,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396866501] [2020-10-13 15:09:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:09:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1236 [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:09:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 15:09:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 15:09:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:48,854 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:09:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:09:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:09:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:09:48,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:09:48,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:09:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:09:48,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396866501] [2020-10-13 15:09:48,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:09:48,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:09:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160274324] [2020-10-13 15:09:48,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:09:48,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:09:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:09:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:09:48,895 INFO L87 Difference]: Start difference. First operand 134482 states and 217280 transitions. Second operand 4 states. [2020-10-13 15:09:49,276 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:09:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:09:59,577 INFO L93 Difference]: Finished difference Result 295156 states and 477430 transitions. [2020-10-13 15:09:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:09:59,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-13 15:09:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:09:59,852 INFO L225 Difference]: With dead ends: 295156 [2020-10-13 15:09:59,852 INFO L226 Difference]: Without dead ends: 160951 [2020-10-13 15:09:59,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160951 states. [2020-10-13 15:10:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160951 to 160685. [2020-10-13 15:10:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160685 states. [2020-10-13 15:10:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160685 states to 160685 states and 259211 transitions. [2020-10-13 15:10:10,965 INFO L78 Accepts]: Start accepts. Automaton has 160685 states and 259211 transitions. Word has length 129 [2020-10-13 15:10:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:10,965 INFO L479 AbstractCegarLoop]: Abstraction has 160685 states and 259211 transitions. [2020-10-13 15:10:10,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:10:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 160685 states and 259211 transitions. [2020-10-13 15:10:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 15:10:10,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:10,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:10,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:10:10,967 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash -587252332, now seen corresponding path program 1 times [2020-10-13 15:10:10,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:10,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355451635] [2020-10-13 15:10:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:12,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:15,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:15,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 15:10:15,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:10:15,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:10:15,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:10:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 15:10:15,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 15:10:15,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:16,646 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:10:16,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:16,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:16,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:16,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:16,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355451635] [2020-10-13 15:10:16,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:16,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:10:16,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261081817] [2020-10-13 15:10:16,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:10:16,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:10:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:10:16,712 INFO L87 Difference]: Start difference. First operand 160685 states and 259211 transitions. Second operand 7 states. [2020-10-13 15:10:17,192 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2020-10-13 15:10:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:42,042 INFO L93 Difference]: Finished difference Result 538867 states and 869983 transitions. [2020-10-13 15:10:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:10:42,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-13 15:10:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:42,705 INFO L225 Difference]: With dead ends: 538867 [2020-10-13 15:10:42,705 INFO L226 Difference]: Without dead ends: 381455 [2020-10-13 15:10:42,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:10:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381455 states. [2020-10-13 15:10:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381455 to 160685. [2020-10-13 15:10:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160685 states. [2020-10-13 15:10:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160685 states to 160685 states and 258835 transitions. [2020-10-13 15:10:53,224 INFO L78 Accepts]: Start accepts. Automaton has 160685 states and 258835 transitions. Word has length 131 [2020-10-13 15:10:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:53,225 INFO L479 AbstractCegarLoop]: Abstraction has 160685 states and 258835 transitions. [2020-10-13 15:10:53,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:10:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 160685 states and 258835 transitions. [2020-10-13 15:10:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 15:10:53,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:53,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:53,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:10:53,226 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:53,226 INFO L82 PathProgramCache]: Analyzing trace with hash -608393306, now seen corresponding path program 1 times [2020-10-13 15:10:53,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:53,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099832463] [2020-10-13 15:10:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:53,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:53,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:53,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:59,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:59,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5573 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 15:10:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:59,722 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:10:59,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:59,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:59,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:59,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:59,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:10:59,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:59,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:59,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099832463] [2020-10-13 15:10:59,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:59,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:10:59,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834910622] [2020-10-13 15:10:59,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:10:59,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:10:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:10:59,763 INFO L87 Difference]: Start difference. First operand 160685 states and 258835 transitions. Second operand 4 states. [2020-10-13 15:11:00,166 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-10-13 15:11:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:16,769 INFO L93 Difference]: Finished difference Result 429312 states and 686505 transitions. [2020-10-13 15:11:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:11:16,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-10-13 15:11:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:17,181 INFO L225 Difference]: With dead ends: 429312 [2020-10-13 15:11:17,182 INFO L226 Difference]: Without dead ends: 268893 [2020-10-13 15:11:17,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:11:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268893 states.