/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:35:35,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:35:35,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:35:35,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:35:35,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:35:35,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:35:35,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:35:35,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:35:35,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:35:35,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:35:35,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:35:35,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:35:35,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:35:35,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:35:35,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:35:35,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:35:35,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:35:35,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:35:35,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:35:35,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:35:35,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:35:35,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:35:35,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:35:35,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:35:35,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:35:35,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:35:35,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:35:35,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:35:35,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:35:35,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:35:35,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:35:35,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:35:35,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:35:35,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:35:35,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:35:35,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:35:35,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:35:35,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:35:35,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:35:35,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:35:35,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:35:35,982 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 [2020-10-12 19:35:36,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:35:36,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:35:36,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:35:36,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:35:36,007 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:35:36,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:35:36,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:35:36,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:35:36,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:35:36,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:35:36,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:35:36,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:35:36,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:35:36,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:35:36,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:35:36,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:35:36,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:35:36,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:35:36,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:35:36,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:35:36,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:35:36,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:35:36,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:35:36,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:35:36,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:35:36,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:35:36,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:35:36,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:35:36,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:35:36,012 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:35:36,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:35:36,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:35:36,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:35:36,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:35:36,368 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:35:36,369 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:35:36,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/737c86644/c0f94e604e5647cea5ad822696553734/FLAG89c5c4e88 [2020-10-12 19:35:36,942 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:35:36,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:35:36,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/737c86644/c0f94e604e5647cea5ad822696553734/FLAG89c5c4e88 [2020-10-12 19:35:37,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/737c86644/c0f94e604e5647cea5ad822696553734 [2020-10-12 19:35:37,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:35:37,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:35:37,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:35:37,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:35:37,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:35:37,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43889371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37, skipping insertion in model container [2020-10-12 19:35:37,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:35:37,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:35:37,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:35:37,640 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:35:37,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:35:37,808 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:35:37,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37 WrapperNode [2020-10-12 19:35:37,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:35:37,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:35:37,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:35:37,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:35:37,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (1/1) ... [2020-10-12 19:35:37,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:35:37,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:35:37,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:35:37,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:35:37,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (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 [2020-10-12 19:35:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:35:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:35:37,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:35:37,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:35:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:35:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:35:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:35:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:35:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:35:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:35:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:35:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:35:38,539 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:35:38,539 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:35:38,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:35:38 BoogieIcfgContainer [2020-10-12 19:35:38,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:35:38,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:35:38,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:35:38,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:35:38,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:35:37" (1/3) ... [2020-10-12 19:35:38,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76483195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:35:38, skipping insertion in model container [2020-10-12 19:35:38,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:35:37" (2/3) ... [2020-10-12 19:35:38,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76483195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:35:38, skipping insertion in model container [2020-10-12 19:35:38,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:35:38" (3/3) ... [2020-10-12 19:35:38,559 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:35:38,571 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:35:38,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:35:38,603 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:35:38,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:35:38,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:35:38,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:35:38,636 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:35:38,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:35:38,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:35:38,637 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:35:38,637 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:35:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-10-12 19:35:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:35:38,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:38,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:38,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1959120292, now seen corresponding path program 1 times [2020-10-12 19:35:38,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:38,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361003451] [2020-10-12 19:35:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:39,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:43,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:43,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:35:43,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:35:43,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:35:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:35:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:35:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:35:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:35:44,383 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:35:44,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:44,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:44,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:44,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 19:35:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:35:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:44,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361003451] [2020-10-12 19:35:44,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:44,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:35:44,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251177649] [2020-10-12 19:35:44,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:35:44,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:35:44,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:35:44,511 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 8 states. [2020-10-12 19:35:45,001 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:35:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:46,227 INFO L93 Difference]: Finished difference Result 742 states and 1170 transitions. [2020-10-12 19:35:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:46,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 19:35:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:46,267 INFO L225 Difference]: With dead ends: 742 [2020-10-12 19:35:46,267 INFO L226 Difference]: Without dead ends: 638 [2020-10-12 19:35:46,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:35:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-12 19:35:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 156. [2020-10-12 19:35:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 19:35:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 225 transitions. [2020-10-12 19:35:46,376 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 225 transitions. Word has length 63 [2020-10-12 19:35:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:46,378 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 225 transitions. [2020-10-12 19:35:46,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:35:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 225 transitions. [2020-10-12 19:35:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:35:46,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:46,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:46,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:35:46,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1285622915, now seen corresponding path program 1 times [2020-10-12 19:35:46,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:46,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018462379] [2020-10-12 19:35:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:46,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:46,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:46,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:46,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:51,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:35:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:35:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 19:35:51,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:35:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 19:35:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:35:51,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:35:51,705 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:35:51,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:51,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:51,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:51,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:51,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:35:51,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:51,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:51,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:51,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:51,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018462379] [2020-10-12 19:35:51,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:51,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:35:51,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779789091] [2020-10-12 19:35:51,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:35:51,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:35:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:35:51,768 INFO L87 Difference]: Start difference. First operand 156 states and 225 transitions. Second operand 8 states. [2020-10-12 19:35:51,998 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:35:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:52,847 INFO L93 Difference]: Finished difference Result 1022 states and 1590 transitions. [2020-10-12 19:35:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:52,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:35:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:52,854 INFO L225 Difference]: With dead ends: 1022 [2020-10-12 19:35:52,854 INFO L226 Difference]: Without dead ends: 904 [2020-10-12 19:35:52,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:35:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-12 19:35:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 326. [2020-10-12 19:35:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-12 19:35:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 495 transitions. [2020-10-12 19:35:52,910 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 495 transitions. Word has length 65 [2020-10-12 19:35:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:52,911 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 495 transitions. [2020-10-12 19:35:52,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:35:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 495 transitions. [2020-10-12 19:35:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:35:52,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:52,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:52,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:35:52,920 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1583607403, now seen corresponding path program 1 times [2020-10-12 19:35:52,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:52,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427250530] [2020-10-12 19:35:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:53,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:54,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:57,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:57,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:35:57,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:35:57,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:35:57,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:35:57,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:35:57,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:35:57,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-10-12 19:35:58,186 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:35:58,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:58,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:58,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:58,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:58,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:35:58,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:58,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:58,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:58,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:58,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427250530] [2020-10-12 19:35:58,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:58,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:35:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918777599] [2020-10-12 19:35:58,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:35:58,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:35:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:35:58,219 INFO L87 Difference]: Start difference. First operand 326 states and 495 transitions. Second operand 8 states. [2020-10-12 19:35:58,418 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:35:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:58,944 INFO L93 Difference]: Finished difference Result 1244 states and 1936 transitions. [2020-10-12 19:35:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:58,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:35:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:58,951 INFO L225 Difference]: With dead ends: 1244 [2020-10-12 19:35:58,952 INFO L226 Difference]: Without dead ends: 1072 [2020-10-12 19:35:58,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:35:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-10-12 19:35:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 500. [2020-10-12 19:35:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-12 19:35:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 772 transitions. [2020-10-12 19:35:59,006 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 772 transitions. Word has length 65 [2020-10-12 19:35:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:59,008 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 772 transitions. [2020-10-12 19:35:59,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:35:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 772 transitions. [2020-10-12 19:35:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:35:59,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:59,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:35:59,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:35:59,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash 625733375, now seen corresponding path program 1 times [2020-10-12 19:35:59,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:59,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246378725] [2020-10-12 19:35:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:59,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:00,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:02,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:02,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:36:02,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:36:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3559 [2020-10-12 19:36:02,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:36:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 19:36:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:36:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:02,819 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:02,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:02,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:02,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:02,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:02,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:36:02,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:02,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:02,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246378725] [2020-10-12 19:36:02,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:02,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:36:02,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870351248] [2020-10-12 19:36:02,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:36:02,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:36:02,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:36:02,851 INFO L87 Difference]: Start difference. First operand 500 states and 772 transitions. Second operand 5 states. [2020-10-12 19:36:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:03,458 INFO L93 Difference]: Finished difference Result 966 states and 1503 transitions. [2020-10-12 19:36:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:36:03,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-12 19:36:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:03,464 INFO L225 Difference]: With dead ends: 966 [2020-10-12 19:36:03,465 INFO L226 Difference]: Without dead ends: 964 [2020-10-12 19:36:03,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:36:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-10-12 19:36:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 514. [2020-10-12 19:36:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-12 19:36:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 786 transitions. [2020-10-12 19:36:03,518 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 786 transitions. Word has length 65 [2020-10-12 19:36:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:03,518 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 786 transitions. [2020-10-12 19:36:03,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:36:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 786 transitions. [2020-10-12 19:36:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:36:03,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:03,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:03,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:36:03,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash 645782718, now seen corresponding path program 1 times [2020-10-12 19:36:03,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:03,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032757780] [2020-10-12 19:36:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:07,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:07,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:36:07,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:36:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3521 [2020-10-12 19:36:07,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:36:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:36:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:07,293 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:07,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:07,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:07,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:07,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:36:07,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:07,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:07,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032757780] [2020-10-12 19:36:07,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:07,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:36:07,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669959720] [2020-10-12 19:36:07,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:07,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:07,341 INFO L87 Difference]: Start difference. First operand 514 states and 786 transitions. Second operand 8 states. [2020-10-12 19:36:07,576 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 19:36:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:08,309 INFO L93 Difference]: Finished difference Result 1530 states and 2368 transitions. [2020-10-12 19:36:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:36:08,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:36:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:08,316 INFO L225 Difference]: With dead ends: 1530 [2020-10-12 19:36:08,316 INFO L226 Difference]: Without dead ends: 1054 [2020-10-12 19:36:08,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:36:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-10-12 19:36:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 514. [2020-10-12 19:36:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-12 19:36:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 782 transitions. [2020-10-12 19:36:08,379 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 782 transitions. Word has length 65 [2020-10-12 19:36:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:08,380 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 782 transitions. [2020-10-12 19:36:08,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:36:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 782 transitions. [2020-10-12 19:36:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:36:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:08,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:08,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:36:08,382 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1607352625, now seen corresponding path program 1 times [2020-10-12 19:36:08,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:08,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194361657] [2020-10-12 19:36:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:08,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:10,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:13,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:13,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:36:13,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:36:13,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:36:13,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:13,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:36:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:36:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:13,632 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:13,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:13,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:13,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:13,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:13,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:13,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:36:13,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:13,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:13,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:13,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194361657] [2020-10-12 19:36:13,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:13,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:36:13,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361379644] [2020-10-12 19:36:13,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:13,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:13,682 INFO L87 Difference]: Start difference. First operand 514 states and 782 transitions. Second operand 8 states. [2020-10-12 19:36:13,950 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:36:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:14,980 INFO L93 Difference]: Finished difference Result 1459 states and 2247 transitions. [2020-10-12 19:36:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:36:14,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:36:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:14,987 INFO L225 Difference]: With dead ends: 1459 [2020-10-12 19:36:14,987 INFO L226 Difference]: Without dead ends: 1283 [2020-10-12 19:36:14,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:36:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2020-10-12 19:36:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 634. [2020-10-12 19:36:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-12 19:36:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 970 transitions. [2020-10-12 19:36:15,059 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 970 transitions. Word has length 65 [2020-10-12 19:36:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:15,059 INFO L479 AbstractCegarLoop]: Abstraction has 634 states and 970 transitions. [2020-10-12 19:36:15,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:36:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 970 transitions. [2020-10-12 19:36:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:36:15,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:15,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:15,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:36:15,061 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1979878519, now seen corresponding path program 1 times [2020-10-12 19:36:15,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:15,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122017952] [2020-10-12 19:36:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:20,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:20,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:36:20,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:36:20,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:36:20,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:36:20,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:36:20,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:20,307 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:20,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:20,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:20,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:36:20,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:20,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122017952] [2020-10-12 19:36:20,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:20,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:36:20,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213064806] [2020-10-12 19:36:20,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:20,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:20,347 INFO L87 Difference]: Start difference. First operand 634 states and 970 transitions. Second operand 8 states. [2020-10-12 19:36:20,568 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:36:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:21,391 INFO L93 Difference]: Finished difference Result 1602 states and 2470 transitions. [2020-10-12 19:36:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:36:21,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:36:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:21,401 INFO L225 Difference]: With dead ends: 1602 [2020-10-12 19:36:21,401 INFO L226 Difference]: Without dead ends: 1426 [2020-10-12 19:36:21,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:36:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-10-12 19:36:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 754. [2020-10-12 19:36:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-10-12 19:36:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1158 transitions. [2020-10-12 19:36:21,500 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1158 transitions. Word has length 65 [2020-10-12 19:36:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:21,500 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1158 transitions. [2020-10-12 19:36:21,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:36:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1158 transitions. [2020-10-12 19:36:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:36:21,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:21,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:21,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:36:21,508 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash 402730947, now seen corresponding path program 1 times [2020-10-12 19:36:21,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:21,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285366396] [2020-10-12 19:36:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:26,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:26,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:36:26,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:36:26,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:36:26,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:36:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:36:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:26,721 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:26,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:26,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:26,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:36:26,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:26,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285366396] [2020-10-12 19:36:26,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:26,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:36:26,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117926397] [2020-10-12 19:36:26,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:26,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:26,765 INFO L87 Difference]: Start difference. First operand 754 states and 1158 transitions. Second operand 8 states. [2020-10-12 19:36:26,956 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:36:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:27,844 INFO L93 Difference]: Finished difference Result 1755 states and 2709 transitions. [2020-10-12 19:36:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:36:27,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:36:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:27,862 INFO L225 Difference]: With dead ends: 1755 [2020-10-12 19:36:27,862 INFO L226 Difference]: Without dead ends: 1579 [2020-10-12 19:36:27,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:36:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-10-12 19:36:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 874. [2020-10-12 19:36:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-12 19:36:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1346 transitions. [2020-10-12 19:36:27,973 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1346 transitions. Word has length 65 [2020-10-12 19:36:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:27,973 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 1346 transitions. [2020-10-12 19:36:27,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:36:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1346 transitions. [2020-10-12 19:36:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:36:27,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:27,975 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] [2020-10-12 19:36:27,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:36:27,975 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2067482087, now seen corresponding path program 1 times [2020-10-12 19:36:27,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:27,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043236034] [2020-10-12 19:36:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:28,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:28,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:36:28,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-12 19:36:28,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:36:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:36:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:36:28,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:29,152 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:29,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:29,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:29,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:29,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:29,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:36:29,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:29,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:29,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:29,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:29,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:29,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043236034] [2020-10-12 19:36:29,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:29,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:36:29,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883748267] [2020-10-12 19:36:29,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:36:29,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:36:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:36:29,191 INFO L87 Difference]: Start difference. First operand 874 states and 1346 transitions. Second operand 5 states. [2020-10-12 19:36:29,353 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:36:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:30,108 INFO L93 Difference]: Finished difference Result 3124 states and 4867 transitions. [2020-10-12 19:36:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:36:30,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:36:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:30,122 INFO L225 Difference]: With dead ends: 3124 [2020-10-12 19:36:30,122 INFO L226 Difference]: Without dead ends: 2288 [2020-10-12 19:36:30,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:36:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2020-10-12 19:36:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2284. [2020-10-12 19:36:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2020-10-12 19:36:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3520 transitions. [2020-10-12 19:36:30,391 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3520 transitions. Word has length 66 [2020-10-12 19:36:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:30,392 INFO L479 AbstractCegarLoop]: Abstraction has 2284 states and 3520 transitions. [2020-10-12 19:36:30,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:36:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3520 transitions. [2020-10-12 19:36:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:30,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:30,394 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] [2020-10-12 19:36:30,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:36:30,394 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1635572434, now seen corresponding path program 1 times [2020-10-12 19:36:30,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:30,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997625300] [2020-10-12 19:36:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:35,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:35,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:35,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:36:35,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:36:35,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:36:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 19:36:35,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:36:35,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:35,589 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:35,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:35,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:35,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:35,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:35,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:36:35,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:35,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:35,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997625300] [2020-10-12 19:36:35,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:35,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:36:35,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868141931] [2020-10-12 19:36:35,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:36:35,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:36:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:36:35,618 INFO L87 Difference]: Start difference. First operand 2284 states and 3520 transitions. Second operand 8 states. [2020-10-12 19:36:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:36,841 INFO L93 Difference]: Finished difference Result 4841 states and 7419 transitions. [2020-10-12 19:36:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:36:36,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-12 19:36:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:36,864 INFO L225 Difference]: With dead ends: 4841 [2020-10-12 19:36:36,864 INFO L226 Difference]: Without dead ends: 4510 [2020-10-12 19:36:36,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:36:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-10-12 19:36:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 2351. [2020-10-12 19:36:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2351 states. [2020-10-12 19:36:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3627 transitions. [2020-10-12 19:36:37,157 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3627 transitions. Word has length 67 [2020-10-12 19:36:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:37,158 INFO L479 AbstractCegarLoop]: Abstraction has 2351 states and 3627 transitions. [2020-10-12 19:36:37,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:36:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3627 transitions. [2020-10-12 19:36:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:37,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:37,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:37,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:36:37,160 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 593817687, now seen corresponding path program 1 times [2020-10-12 19:36:37,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:37,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352674369] [2020-10-12 19:36:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:37,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:40,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:40,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:40,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:36:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:40,486 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:40,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:40,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:40,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:40,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:36:40,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:40,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:40,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352674369] [2020-10-12 19:36:40,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:40,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:36:40,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698553941] [2020-10-12 19:36:40,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:36:40,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:36:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:36:40,522 INFO L87 Difference]: Start difference. First operand 2351 states and 3627 transitions. Second operand 7 states. [2020-10-12 19:36:40,693 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:36:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:41,537 INFO L93 Difference]: Finished difference Result 4337 states and 6736 transitions. [2020-10-12 19:36:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:36:41,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:36:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:41,555 INFO L225 Difference]: With dead ends: 4337 [2020-10-12 19:36:41,555 INFO L226 Difference]: Without dead ends: 3719 [2020-10-12 19:36:41,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:36:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2020-10-12 19:36:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2289. [2020-10-12 19:36:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-10-12 19:36:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3528 transitions. [2020-10-12 19:36:41,868 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3528 transitions. Word has length 67 [2020-10-12 19:36:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:41,869 INFO L479 AbstractCegarLoop]: Abstraction has 2289 states and 3528 transitions. [2020-10-12 19:36:41,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:36:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3528 transitions. [2020-10-12 19:36:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:41,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:41,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:41,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:36:41,871 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1993533551, now seen corresponding path program 1 times [2020-10-12 19:36:41,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:41,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202488523] [2020-10-12 19:36:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:41,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:42,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:44,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:44,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:44,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-12 19:36:44,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:36:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:36:44,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:44,396 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:44,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:44,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:44,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:44,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202488523] [2020-10-12 19:36:44,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:44,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:36:44,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525527671] [2020-10-12 19:36:44,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:36:44,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:36:44,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:36:44,432 INFO L87 Difference]: Start difference. First operand 2289 states and 3528 transitions. Second operand 7 states. [2020-10-12 19:36:44,583 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:36:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:45,578 INFO L93 Difference]: Finished difference Result 6724 states and 10321 transitions. [2020-10-12 19:36:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:36:45,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:36:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:45,599 INFO L225 Difference]: With dead ends: 6724 [2020-10-12 19:36:45,600 INFO L226 Difference]: Without dead ends: 4478 [2020-10-12 19:36:45,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:36:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2020-10-12 19:36:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2472. [2020-10-12 19:36:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2020-10-12 19:36:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3807 transitions. [2020-10-12 19:36:45,916 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3807 transitions. Word has length 67 [2020-10-12 19:36:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:45,916 INFO L479 AbstractCegarLoop]: Abstraction has 2472 states and 3807 transitions. [2020-10-12 19:36:45,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:36:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3807 transitions. [2020-10-12 19:36:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:45,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:45,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:45,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:36:45,919 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash 649211689, now seen corresponding path program 1 times [2020-10-12 19:36:45,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:45,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266966482] [2020-10-12 19:36:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:45,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:45,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:45,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:46,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:48,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:48,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2424 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:36:48,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:48,583 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:48,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:48,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:48,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:48,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266966482] [2020-10-12 19:36:48,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:48,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:36:48,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864227331] [2020-10-12 19:36:48,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:36:48,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:36:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:36:48,617 INFO L87 Difference]: Start difference. First operand 2472 states and 3807 transitions. Second operand 7 states. [2020-10-12 19:36:48,773 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:36:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:49,844 INFO L93 Difference]: Finished difference Result 7116 states and 10931 transitions. [2020-10-12 19:36:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:36:49,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:36:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:49,857 INFO L225 Difference]: With dead ends: 7116 [2020-10-12 19:36:49,857 INFO L226 Difference]: Without dead ends: 4814 [2020-10-12 19:36:49,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:36:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2020-10-12 19:36:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 2448. [2020-10-12 19:36:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2020-10-12 19:36:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3757 transitions. [2020-10-12 19:36:50,138 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3757 transitions. Word has length 67 [2020-10-12 19:36:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:50,139 INFO L479 AbstractCegarLoop]: Abstraction has 2448 states and 3757 transitions. [2020-10-12 19:36:50,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:36:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3757 transitions. [2020-10-12 19:36:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:50,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:50,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:50,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:36:50,141 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -865886877, now seen corresponding path program 1 times [2020-10-12 19:36:50,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:50,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797632978] [2020-10-12 19:36:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:50,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:52,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:52,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:52,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:52,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-12 19:36:52,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:36:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:36:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:52,781 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:52,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:52,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:52,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:52,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797632978] [2020-10-12 19:36:52,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:52,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:36:52,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681637403] [2020-10-12 19:36:52,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:36:52,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:36:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:36:52,833 INFO L87 Difference]: Start difference. First operand 2448 states and 3757 transitions. Second operand 7 states. [2020-10-12 19:36:52,983 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:36:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:54,023 INFO L93 Difference]: Finished difference Result 7508 states and 11545 transitions. [2020-10-12 19:36:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:36:54,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:36:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:54,035 INFO L225 Difference]: With dead ends: 7508 [2020-10-12 19:36:54,035 INFO L226 Difference]: Without dead ends: 5158 [2020-10-12 19:36:54,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:36:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2020-10-12 19:36:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 2392. [2020-10-12 19:36:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2392 states. [2020-10-12 19:36:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3673 transitions. [2020-10-12 19:36:54,456 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3673 transitions. Word has length 67 [2020-10-12 19:36:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:54,456 INFO L479 AbstractCegarLoop]: Abstraction has 2392 states and 3673 transitions. [2020-10-12 19:36:54,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:36:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3673 transitions. [2020-10-12 19:36:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:36:54,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:54,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:54,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:36:54,464 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:54,465 INFO L82 PathProgramCache]: Analyzing trace with hash -395758819, now seen corresponding path program 1 times [2020-10-12 19:36:54,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:54,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808415482] [2020-10-12 19:36:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:54,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:54,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:57,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:57,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:36:57,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:36:57,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2725 [2020-10-12 19:36:57,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:36:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:57,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:36:57,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:57,376 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:36:57,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:57,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:57,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:57,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808415482] [2020-10-12 19:36:57,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:57,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:36:57,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663307063] [2020-10-12 19:36:57,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:36:57,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:36:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:36:57,412 INFO L87 Difference]: Start difference. First operand 2392 states and 3673 transitions. Second operand 7 states. [2020-10-12 19:36:57,569 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 19:36:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:58,661 INFO L93 Difference]: Finished difference Result 7844 states and 12091 transitions. [2020-10-12 19:36:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:36:58,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:36:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:58,674 INFO L225 Difference]: With dead ends: 7844 [2020-10-12 19:36:58,674 INFO L226 Difference]: Without dead ends: 5514 [2020-10-12 19:36:58,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:36:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2020-10-12 19:36:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 2348. [2020-10-12 19:36:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-10-12 19:36:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3609 transitions. [2020-10-12 19:36:59,113 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3609 transitions. Word has length 67 [2020-10-12 19:36:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:59,114 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 3609 transitions. [2020-10-12 19:36:59,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:36:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3609 transitions. [2020-10-12 19:36:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:36:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:59,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:36:59,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:36:59,117 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1734217254, now seen corresponding path program 1 times [2020-10-12 19:36:59,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:59,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168255098] [2020-10-12 19:36:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:00,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:04,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:37:04,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:37:04,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 19:37:04,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:04,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:04,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 19:37:04,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:37:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:04,297 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:04,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:04,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:04,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:04,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:04,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:04,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:04,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 19:37:04,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168255098] [2020-10-12 19:37:04,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:04,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:37:04,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931179138] [2020-10-12 19:37:04,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:37:04,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:37:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:37:04,332 INFO L87 Difference]: Start difference. First operand 2348 states and 3609 transitions. Second operand 4 states. [2020-10-12 19:37:04,501 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:37:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:05,390 INFO L93 Difference]: Finished difference Result 6526 states and 10061 transitions. [2020-10-12 19:37:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:37:05,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-12 19:37:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:05,399 INFO L225 Difference]: With dead ends: 6526 [2020-10-12 19:37:05,399 INFO L226 Difference]: Without dead ends: 4270 [2020-10-12 19:37:05,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:37:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2020-10-12 19:37:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4268. [2020-10-12 19:37:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4268 states. [2020-10-12 19:37:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6524 transitions. [2020-10-12 19:37:06,147 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6524 transitions. Word has length 93 [2020-10-12 19:37:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:06,147 INFO L479 AbstractCegarLoop]: Abstraction has 4268 states and 6524 transitions. [2020-10-12 19:37:06,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:37:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6524 transitions. [2020-10-12 19:37:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:37:06,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:06,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:06,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:37:06,151 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1647428393, now seen corresponding path program 1 times [2020-10-12 19:37:06,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:06,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400736995] [2020-10-12 19:37:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:11,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:37:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:11,320 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:11,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:11,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:11,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:11,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:37:11,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 19:37:11,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400736995] [2020-10-12 19:37:11,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:11,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:37:11,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110269509] [2020-10-12 19:37:11,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:37:11,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:37:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:11,353 INFO L87 Difference]: Start difference. First operand 4268 states and 6524 transitions. Second operand 6 states. [2020-10-12 19:37:11,509 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:37:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:12,308 INFO L93 Difference]: Finished difference Result 8448 states and 12939 transitions. [2020-10-12 19:37:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:37:12,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-12 19:37:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:12,314 INFO L225 Difference]: With dead ends: 8448 [2020-10-12 19:37:12,314 INFO L226 Difference]: Without dead ends: 4268 [2020-10-12 19:37:12,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:37:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2020-10-12 19:37:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4268. [2020-10-12 19:37:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4268 states. [2020-10-12 19:37:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6482 transitions. [2020-10-12 19:37:12,856 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6482 transitions. Word has length 94 [2020-10-12 19:37:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:12,856 INFO L479 AbstractCegarLoop]: Abstraction has 4268 states and 6482 transitions. [2020-10-12 19:37:12,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:37:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6482 transitions. [2020-10-12 19:37:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:37:12,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:12,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:12,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:37:12,860 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash -988317490, now seen corresponding path program 1 times [2020-10-12 19:37:12,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:12,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415352172] [2020-10-12 19:37:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:13,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:17,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:37:17,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:37:17,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:37:17,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:37:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:37:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 19:37:17,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:18,209 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:18,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:18,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:18,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:37:18,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:18,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415352172] [2020-10-12 19:37:18,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:18,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:37:18,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000531137] [2020-10-12 19:37:18,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:37:18,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:37:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:37:18,277 INFO L87 Difference]: Start difference. First operand 4268 states and 6482 transitions. Second operand 11 states. [2020-10-12 19:37:18,526 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:37:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:24,304 INFO L93 Difference]: Finished difference Result 31872 states and 47876 transitions. [2020-10-12 19:37:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:37:24,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-10-12 19:37:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:24,344 INFO L225 Difference]: With dead ends: 31872 [2020-10-12 19:37:24,345 INFO L226 Difference]: Without dead ends: 27702 [2020-10-12 19:37:24,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:37:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27702 states. [2020-10-12 19:37:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27702 to 11288. [2020-10-12 19:37:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11288 states. [2020-10-12 19:37:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11288 states to 11288 states and 17055 transitions. [2020-10-12 19:37:26,471 INFO L78 Accepts]: Start accepts. Automaton has 11288 states and 17055 transitions. Word has length 94 [2020-10-12 19:37:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:26,471 INFO L479 AbstractCegarLoop]: Abstraction has 11288 states and 17055 transitions. [2020-10-12 19:37:26,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:37:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11288 states and 17055 transitions. [2020-10-12 19:37:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:37:26,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:26,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:26,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:37:26,477 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1753759001, now seen corresponding path program 1 times [2020-10-12 19:37:26,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:26,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291064433] [2020-10-12 19:37:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:26,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:31,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:31,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:37:31,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:37:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:37:31,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:37:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 19:37:31,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:31,768 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:31,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:31,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:31,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:37:31,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:31,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291064433] [2020-10-12 19:37:31,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:31,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:37:31,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072798243] [2020-10-12 19:37:31,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:31,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:31,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:31,826 INFO L87 Difference]: Start difference. First operand 11288 states and 17055 transitions. Second operand 8 states. [2020-10-12 19:37:31,975 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:37:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:36,834 INFO L93 Difference]: Finished difference Result 41664 states and 62279 transitions. [2020-10-12 19:37:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:36,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-12 19:37:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:36,870 INFO L225 Difference]: With dead ends: 41664 [2020-10-12 19:37:36,870 INFO L226 Difference]: Without dead ends: 30450 [2020-10-12 19:37:36,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30450 states. [2020-10-12 19:37:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30450 to 13311. [2020-10-12 19:37:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13311 states. [2020-10-12 19:37:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13311 states to 13311 states and 19471 transitions. [2020-10-12 19:37:39,141 INFO L78 Accepts]: Start accepts. Automaton has 13311 states and 19471 transitions. Word has length 95 [2020-10-12 19:37:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:39,142 INFO L479 AbstractCegarLoop]: Abstraction has 13311 states and 19471 transitions. [2020-10-12 19:37:39,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 13311 states and 19471 transitions. [2020-10-12 19:37:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:37:39,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:39,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:37:39,155 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1087897690, now seen corresponding path program 1 times [2020-10-12 19:37:39,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:39,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033820668] [2020-10-12 19:37:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:40,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:44,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:37:44,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:37:44,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:37:44,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:37:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:37:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:37:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:44,510 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:44,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:44,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033820668] [2020-10-12 19:37:44,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:44,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:37:44,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22756377] [2020-10-12 19:37:44,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:37:44,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:37:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:37:44,543 INFO L87 Difference]: Start difference. First operand 13311 states and 19471 transitions. Second operand 10 states. [2020-10-12 19:37:44,707 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:37:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:51,042 INFO L93 Difference]: Finished difference Result 34311 states and 50118 transitions. [2020-10-12 19:37:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:37:51,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2020-10-12 19:37:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:51,071 INFO L225 Difference]: With dead ends: 34311 [2020-10-12 19:37:51,072 INFO L226 Difference]: Without dead ends: 29434 [2020-10-12 19:37:51,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:37:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29434 states. [2020-10-12 19:37:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29434 to 13631. [2020-10-12 19:37:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13631 states. [2020-10-12 19:37:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13631 states to 13631 states and 19951 transitions. [2020-10-12 19:37:53,338 INFO L78 Accepts]: Start accepts. Automaton has 13631 states and 19951 transitions. Word has length 95 [2020-10-12 19:37:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:53,338 INFO L479 AbstractCegarLoop]: Abstraction has 13631 states and 19951 transitions. [2020-10-12 19:37:53,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:37:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 13631 states and 19951 transitions. [2020-10-12 19:37:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:37:53,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:53,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:53,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:37:53,343 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -912896361, now seen corresponding path program 1 times [2020-10-12 19:37:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:53,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690713384] [2020-10-12 19:37:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:57,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:37:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:37:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 19:37:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:58,580 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:37:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:58,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:58,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:58,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690713384] [2020-10-12 19:37:58,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:37:58,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:37:58,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599845037] [2020-10-12 19:37:58,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:37:58,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:37:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:58,620 INFO L87 Difference]: Start difference. First operand 13631 states and 19951 transitions. Second operand 6 states. [2020-10-12 19:37:58,772 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-12 19:38:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:02,228 INFO L93 Difference]: Finished difference Result 23485 states and 34675 transitions. [2020-10-12 19:38:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:38:02,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-12 19:38:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:02,250 INFO L225 Difference]: With dead ends: 23485 [2020-10-12 19:38:02,250 INFO L226 Difference]: Without dead ends: 18335 [2020-10-12 19:38:02,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2020-10-12 19:38:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 18329. [2020-10-12 19:38:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18329 states. [2020-10-12 19:38:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 26791 transitions. [2020-10-12 19:38:05,172 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 26791 transitions. Word has length 95 [2020-10-12 19:38:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:05,172 INFO L479 AbstractCegarLoop]: Abstraction has 18329 states and 26791 transitions. [2020-10-12 19:38:05,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:38:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 26791 transitions. [2020-10-12 19:38:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:38:05,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:05,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:05,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:38:05,177 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1347821003, now seen corresponding path program 1 times [2020-10-12 19:38:05,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:05,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848330875] [2020-10-12 19:38:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:05,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:38:10,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:38:10,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,386 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:10,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:10,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:38:10,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:10,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:10,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848330875] [2020-10-12 19:38:10,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:38:10,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 19:38:10,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506274126] [2020-10-12 19:38:10,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:10,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:10,416 INFO L87 Difference]: Start difference. First operand 18329 states and 26791 transitions. Second operand 8 states. [2020-10-12 19:38:10,576 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:38:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:20,435 INFO L93 Difference]: Finished difference Result 71924 states and 104565 transitions. [2020-10-12 19:38:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:38:20,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-12 19:38:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:20,504 INFO L225 Difference]: With dead ends: 71924 [2020-10-12 19:38:20,504 INFO L226 Difference]: Without dead ends: 53669 [2020-10-12 19:38:20,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:38:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53669 states. [2020-10-12 19:38:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53669 to 26573. [2020-10-12 19:38:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26573 states. [2020-10-12 19:38:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26573 states to 26573 states and 38513 transitions. [2020-10-12 19:38:26,386 INFO L78 Accepts]: Start accepts. Automaton has 26573 states and 38513 transitions. Word has length 96 [2020-10-12 19:38:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:26,387 INFO L479 AbstractCegarLoop]: Abstraction has 26573 states and 38513 transitions. [2020-10-12 19:38:26,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26573 states and 38513 transitions. [2020-10-12 19:38:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:38:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:26,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:26,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:38:26,393 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1071236293, now seen corresponding path program 1 times [2020-10-12 19:38:26,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:26,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281972053] [2020-10-12 19:38:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:31,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:31,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:31,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:38:31,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:31,671 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:31,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:31,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:31,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:31,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281972053] [2020-10-12 19:38:31,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:38:31,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:38:31,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926574913] [2020-10-12 19:38:31,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:31,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:31,715 INFO L87 Difference]: Start difference. First operand 26573 states and 38513 transitions. Second operand 8 states. [2020-10-12 19:38:31,877 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:38:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:50,959 INFO L93 Difference]: Finished difference Result 132573 states and 190981 transitions. [2020-10-12 19:38:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:50,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-12 19:38:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:51,096 INFO L225 Difference]: With dead ends: 132573 [2020-10-12 19:38:51,097 INFO L226 Difference]: Without dead ends: 106058 [2020-10-12 19:38:51,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106058 states. [2020-10-12 19:39:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106058 to 55350. [2020-10-12 19:39:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55350 states. [2020-10-12 19:39:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55350 states to 55350 states and 79220 transitions. [2020-10-12 19:39:00,897 INFO L78 Accepts]: Start accepts. Automaton has 55350 states and 79220 transitions. Word has length 96 [2020-10-12 19:39:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:00,897 INFO L479 AbstractCegarLoop]: Abstraction has 55350 states and 79220 transitions. [2020-10-12 19:39:00,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:39:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 55350 states and 79220 transitions. [2020-10-12 19:39:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:39:00,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:00,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:00,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:39:00,907 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash 617831617, now seen corresponding path program 1 times [2020-10-12 19:39:00,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:00,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914637766] [2020-10-12 19:39:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:01,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:01,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:02,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 19:39:05,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:06,187 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:06,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:06,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:06,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:06,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:06,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:39:06,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:06,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:06,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:06,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:06,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:06,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914637766] [2020-10-12 19:39:06,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:39:06,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:39:06,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489722247] [2020-10-12 19:39:06,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:39:06,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:39:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:39:06,228 INFO L87 Difference]: Start difference. First operand 55350 states and 79220 transitions. Second operand 8 states. [2020-10-12 19:39:06,389 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 137