/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:28:46,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:28:46,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:28:46,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:28:46,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:28:46,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:28:46,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:28:46,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:28:46,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:28:46,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:28:46,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:28:46,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:28:46,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:28:46,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:28:46,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:28:46,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:28:46,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:28:46,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:28:46,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:28:46,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:28:46,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:28:46,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:28:46,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:28:46,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:28:46,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:28:46,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:28:46,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:28:46,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:28:46,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:28:46,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:28:46,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:28:46,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:28:46,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:28:46,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:28:46,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:28:46,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:28:46,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:28:46,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:28:46,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:28:46,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:28:46,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:28:46,983 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 [2020-10-27 23:28:47,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:28:47,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:28:47,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:28:47,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:28:47,034 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:28:47,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:28:47,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:28:47,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:28:47,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:28:47,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:28:47,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:28:47,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:28:47,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:28:47,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:28:47,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:28:47,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:28:47,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:28:47,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:28:47,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:28:47,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:28:47,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:28:47,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:28:47,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:28:47,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:28:47,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:28:47,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:28:47,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:28:47,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:28:47,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:28:47,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:28:47,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:28:47,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:28:47,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:28:47,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:28:47,500 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:28:47,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:28:47,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188a432d4/01bd9aee569444b1ba43b324d765016e/FLAG2986c42fe [2020-10-27 23:28:48,252 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:28:48,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:28:48,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188a432d4/01bd9aee569444b1ba43b324d765016e/FLAG2986c42fe [2020-10-27 23:28:48,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188a432d4/01bd9aee569444b1ba43b324d765016e [2020-10-27 23:28:48,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:28:48,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:28:48,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:28:48,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:28:48,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:28:48,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:28:48" (1/1) ... [2020-10-27 23:28:48,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577ab33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:48, skipping insertion in model container [2020-10-27 23:28:48,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:28:48" (1/1) ... [2020-10-27 23:28:48,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:28:48,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:28:49,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:28:49,220 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:28:49,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:28:49,427 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:28:49,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49 WrapperNode [2020-10-27 23:28:49,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:28:49,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:28:49,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:28:49,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:28:49,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (1/1) ... [2020-10-27 23:28:49,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:28:49,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:28:49,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:28:49,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:28:49,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (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 [2020-10-27 23:28:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:28:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:28:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:28:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:28:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:28:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:28:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:28:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:28:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:28:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:28:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:28:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:28:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:28:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:28:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:28:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:28:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:28:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:28:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:28:51,006 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:28:51,007 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:28:51,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:28:51 BoogieIcfgContainer [2020-10-27 23:28:51,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:28:51,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:28:51,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:28:51,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:28:51,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:28:48" (1/3) ... [2020-10-27 23:28:51,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573b4146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:28:51, skipping insertion in model container [2020-10-27 23:28:51,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:28:49" (2/3) ... [2020-10-27 23:28:51,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573b4146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:28:51, skipping insertion in model container [2020-10-27 23:28:51,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:28:51" (3/3) ... [2020-10-27 23:28:51,019 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:28:51,031 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:28:51,037 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:28:51,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:28:51,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:28:51,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:28:51,082 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:28:51,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:28:51,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:28:51,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:28:51,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:28:51,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:28:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states. [2020-10-27 23:28:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 23:28:51,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:51,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:51,126 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1187780318, now seen corresponding path program 1 times [2020-10-27 23:28:51,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:51,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369122508] [2020-10-27 23:28:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:51,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:52,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:56,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 23:28:56,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:28:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 23:28:56,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:28:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 23:28:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:28:56,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:28:57,342 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:28:57,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:57,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:57,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 23:28:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:57,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369122508] [2020-10-27 23:28:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:28:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483892403] [2020-10-27 23:28:57,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:28:57,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:28:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:28:57,462 INFO L87 Difference]: Start difference. First operand 323 states. Second operand 7 states. [2020-10-27 23:28:58,103 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 285 [2020-10-27 23:29:01,159 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:01,658 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:29:02,146 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2020-10-27 23:29:02,831 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:29:03,348 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:29:03,886 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:04,026 INFO L93 Difference]: Finished difference Result 1423 states and 2422 transitions. [2020-10-27 23:29:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:29:04,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-27 23:29:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:04,066 INFO L225 Difference]: With dead ends: 1423 [2020-10-27 23:29:04,066 INFO L226 Difference]: Without dead ends: 1261 [2020-10-27 23:29:04,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:29:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2020-10-27 23:29:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 448. [2020-10-27 23:29:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-27 23:29:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 753 transitions. [2020-10-27 23:29:04,243 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 753 transitions. Word has length 103 [2020-10-27 23:29:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:04,245 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 753 transitions. [2020-10-27 23:29:04,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:29:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 753 transitions. [2020-10-27 23:29:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 23:29:04,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:04,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:04,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:29:04,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash 409304779, now seen corresponding path program 1 times [2020-10-27 23:29:04,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:04,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307930769] [2020-10-27 23:29:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:04,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:05,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:09,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:09,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 23:29:09,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:29:09,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 23:29:09,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:29:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 23:29:09,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:29:09,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:09,913 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:29:09,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:09,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:29:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:09,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307930769] [2020-10-27 23:29:09,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:09,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:29:09,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964046922] [2020-10-27 23:29:09,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:29:09,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:09,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:29:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:29:09,999 INFO L87 Difference]: Start difference. First operand 448 states and 753 transitions. Second operand 8 states. [2020-10-27 23:29:10,624 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2020-10-27 23:29:13,301 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:29:13,807 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:14,319 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:29:14,886 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2020-10-27 23:29:15,514 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:29:16,022 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:29:16,543 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:29:17,613 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:29:18,167 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:29:18,962 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:29:19,435 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:19,461 INFO L93 Difference]: Finished difference Result 3272 states and 5502 transitions. [2020-10-27 23:29:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 23:29:19,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 104 [2020-10-27 23:29:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:19,480 INFO L225 Difference]: With dead ends: 3272 [2020-10-27 23:29:19,480 INFO L226 Difference]: Without dead ends: 3005 [2020-10-27 23:29:19,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-27 23:29:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2020-10-27 23:29:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 1168. [2020-10-27 23:29:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-27 23:29:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1968 transitions. [2020-10-27 23:29:19,623 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1968 transitions. Word has length 104 [2020-10-27 23:29:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:19,623 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1968 transitions. [2020-10-27 23:29:19,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:29:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1968 transitions. [2020-10-27 23:29:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 23:29:19,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:19,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:19,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:29:19,627 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2107301737, now seen corresponding path program 1 times [2020-10-27 23:29:19,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:19,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209367119] [2020-10-27 23:29:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:19,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:20,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:24,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:24,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 23:29:24,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:29:24,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:29:24,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:24,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 23:29:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:29:24,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:25,216 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:29:25,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:25,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:25,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:25,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:25,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209367119] [2020-10-27 23:29:25,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:25,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:25,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691136353] [2020-10-27 23:29:25,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:25,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:25,281 INFO L87 Difference]: Start difference. First operand 1168 states and 1968 transitions. Second operand 5 states. [2020-10-27 23:29:25,841 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:28,010 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2020-10-27 23:29:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:28,168 INFO L93 Difference]: Finished difference Result 3879 states and 6542 transitions. [2020-10-27 23:29:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:29:28,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-27 23:29:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:28,195 INFO L225 Difference]: With dead ends: 3879 [2020-10-27 23:29:28,195 INFO L226 Difference]: Without dead ends: 2989 [2020-10-27 23:29:28,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:29:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2020-10-27 23:29:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2089. [2020-10-27 23:29:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2089 states. [2020-10-27 23:29:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3520 transitions. [2020-10-27 23:29:28,385 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3520 transitions. Word has length 105 [2020-10-27 23:29:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:28,388 INFO L481 AbstractCegarLoop]: Abstraction has 2089 states and 3520 transitions. [2020-10-27 23:29:28,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3520 transitions. [2020-10-27 23:29:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 23:29:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:28,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:28,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:29:28,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1623573604, now seen corresponding path program 1 times [2020-10-27 23:29:28,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963375132] [2020-10-27 23:29:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:28,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:28,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:29,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:33,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:33,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 23:29:33,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:29:33,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:29:33,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 23:29:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:29:33,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:34,061 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:29:34,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:34,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:34,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:34,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:34,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 23:29:34,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:34,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:34,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:34,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:34,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:34,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963375132] [2020-10-27 23:29:34,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:34,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332381558] [2020-10-27 23:29:34,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:34,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:34,154 INFO L87 Difference]: Start difference. First operand 2089 states and 3520 transitions. Second operand 5 states. [2020-10-27 23:29:34,629 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:36,921 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2020-10-27 23:29:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:37,176 INFO L93 Difference]: Finished difference Result 7423 states and 12510 transitions. [2020-10-27 23:29:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:29:37,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 23:29:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:37,209 INFO L225 Difference]: With dead ends: 7423 [2020-10-27 23:29:37,210 INFO L226 Difference]: Without dead ends: 5653 [2020-10-27 23:29:37,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:29:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2020-10-27 23:29:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 3866. [2020-10-27 23:29:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3866 states. [2020-10-27 23:29:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3866 states to 3866 states and 6508 transitions. [2020-10-27 23:29:37,563 INFO L78 Accepts]: Start accepts. Automaton has 3866 states and 6508 transitions. Word has length 106 [2020-10-27 23:29:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:37,564 INFO L481 AbstractCegarLoop]: Abstraction has 3866 states and 6508 transitions. [2020-10-27 23:29:37,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3866 states and 6508 transitions. [2020-10-27 23:29:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 23:29:37,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:37,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:37,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:29:37,605 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1457890896, now seen corresponding path program 1 times [2020-10-27 23:29:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:37,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402479896] [2020-10-27 23:29:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:42,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:42,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 23:29:42,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:29:42,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 23:29:42,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 23:29:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:29:42,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 23:29:43,115 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:29:43,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:43,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:43,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:43,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:43,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:43,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402479896] [2020-10-27 23:29:43,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:43,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:43,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526576571] [2020-10-27 23:29:43,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:43,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:43,176 INFO L87 Difference]: Start difference. First operand 3866 states and 6508 transitions. Second operand 5 states. [2020-10-27 23:29:43,609 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:29:45,817 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 279 [2020-10-27 23:29:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:46,233 INFO L93 Difference]: Finished difference Result 14435 states and 24286 transitions. [2020-10-27 23:29:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:29:46,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 23:29:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:46,291 INFO L225 Difference]: With dead ends: 14435 [2020-10-27 23:29:46,291 INFO L226 Difference]: Without dead ends: 10912 [2020-10-27 23:29:46,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:29:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10912 states. [2020-10-27 23:29:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10912 to 7358. [2020-10-27 23:29:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7358 states. [2020-10-27 23:29:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 12360 transitions. [2020-10-27 23:29:47,063 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 12360 transitions. Word has length 107 [2020-10-27 23:29:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:47,063 INFO L481 AbstractCegarLoop]: Abstraction has 7358 states and 12360 transitions. [2020-10-27 23:29:47,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 12360 transitions. [2020-10-27 23:29:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:29:47,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:47,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:47,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:29:47,067 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1988815947, now seen corresponding path program 1 times [2020-10-27 23:29:47,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:47,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113203621] [2020-10-27 23:29:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:47,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:29:52,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 23:29:52,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:29:52,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:52,677 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:29:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:52,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:52,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:52,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:52,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:52,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113203621] [2020-10-27 23:29:52,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:52,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:29:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823605935] [2020-10-27 23:29:52,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:29:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:29:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:52,742 INFO L87 Difference]: Start difference. First operand 7358 states and 12360 transitions. Second operand 5 states. [2020-10-27 23:29:55,436 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:29:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:56,326 INFO L93 Difference]: Finished difference Result 20579 states and 34542 transitions. [2020-10-27 23:29:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:29:56,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-27 23:29:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:56,364 INFO L225 Difference]: With dead ends: 20579 [2020-10-27 23:29:56,364 INFO L226 Difference]: Without dead ends: 13564 [2020-10-27 23:29:56,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:29:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13564 states. [2020-10-27 23:29:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13564 to 13449. [2020-10-27 23:29:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13449 states. [2020-10-27 23:29:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 22401 transitions. [2020-10-27 23:29:57,655 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 22401 transitions. Word has length 109 [2020-10-27 23:29:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 13449 states and 22401 transitions. [2020-10-27 23:29:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 22401 transitions. [2020-10-27 23:29:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:29:57,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:57,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:57,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:29:57,660 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 356034046, now seen corresponding path program 1 times [2020-10-27 23:29:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:57,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552109274] [2020-10-27 23:29:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:57,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:57,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:02,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:02,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:30:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:30:02,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:03,202 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:30:03,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:03,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:03,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552109274] [2020-10-27 23:30:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:03,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459273796] [2020-10-27 23:30:03,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:03,268 INFO L87 Difference]: Start difference. First operand 13449 states and 22401 transitions. Second operand 4 states. [2020-10-27 23:30:03,780 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:30:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:07,467 INFO L93 Difference]: Finished difference Result 37349 states and 62239 transitions. [2020-10-27 23:30:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:07,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 23:30:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:07,546 INFO L225 Difference]: With dead ends: 37349 [2020-10-27 23:30:07,547 INFO L226 Difference]: Without dead ends: 24099 [2020-10-27 23:30:07,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24099 states. [2020-10-27 23:30:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24099 to 24096. [2020-10-27 23:30:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24096 states. [2020-10-27 23:30:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24096 states to 24096 states and 40053 transitions. [2020-10-27 23:30:09,493 INFO L78 Accepts]: Start accepts. Automaton has 24096 states and 40053 transitions. Word has length 109 [2020-10-27 23:30:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:09,493 INFO L481 AbstractCegarLoop]: Abstraction has 24096 states and 40053 transitions. [2020-10-27 23:30:09,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 24096 states and 40053 transitions. [2020-10-27 23:30:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:30:09,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:09,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:30:09,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:30:09,496 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1852579355, now seen corresponding path program 1 times [2020-10-27 23:30:09,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:09,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601606515] [2020-10-27 23:30:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:09,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:09,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:10,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:14,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 23:30:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:30:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:15,028 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:30:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:15,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:15,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601606515] [2020-10-27 23:30:15,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:15,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:30:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735294429] [2020-10-27 23:30:15,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:30:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:30:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:15,086 INFO L87 Difference]: Start difference. First operand 24096 states and 40053 transitions. Second operand 5 states. [2020-10-27 23:30:17,359 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:30:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:20,224 INFO L93 Difference]: Finished difference Result 68440 states and 113779 transitions. [2020-10-27 23:30:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:30:20,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-27 23:30:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:20,357 INFO L225 Difference]: With dead ends: 68440 [2020-10-27 23:30:20,357 INFO L226 Difference]: Without dead ends: 44651 [2020-10-27 23:30:20,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:30:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44651 states. [2020-10-27 23:30:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44651 to 44200. [2020-10-27 23:30:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44200 states. [2020-10-27 23:30:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44200 states to 44200 states and 73117 transitions. [2020-10-27 23:30:23,689 INFO L78 Accepts]: Start accepts. Automaton has 44200 states and 73117 transitions. Word has length 109 [2020-10-27 23:30:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:23,689 INFO L481 AbstractCegarLoop]: Abstraction has 44200 states and 73117 transitions. [2020-10-27 23:30:23,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:30:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 44200 states and 73117 transitions. [2020-10-27 23:30:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:30:23,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:23,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:30:23,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:30:23,692 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2064070378, now seen corresponding path program 1 times [2020-10-27 23:30:23,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:23,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098252743] [2020-10-27 23:30:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:23,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:28,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 23:30:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 23:30:28,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:29,247 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:30:29,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:29,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098252743] [2020-10-27 23:30:29,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:29,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:29,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859059263] [2020-10-27 23:30:29,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:29,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:29,290 INFO L87 Difference]: Start difference. First operand 44200 states and 73117 transitions. Second operand 4 states. [2020-10-27 23:30:29,762 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:30:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:36,372 INFO L93 Difference]: Finished difference Result 123252 states and 204011 transitions. [2020-10-27 23:30:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:36,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 23:30:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:36,607 INFO L225 Difference]: With dead ends: 123252 [2020-10-27 23:30:36,607 INFO L226 Difference]: Without dead ends: 79317 [2020-10-27 23:30:36,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79317 states. [2020-10-27 23:30:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79317 to 79314. [2020-10-27 23:30:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79314 states. [2020-10-27 23:30:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79314 states to 79314 states and 130879 transitions. [2020-10-27 23:30:42,710 INFO L78 Accepts]: Start accepts. Automaton has 79314 states and 130879 transitions. Word has length 109 [2020-10-27 23:30:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:42,711 INFO L481 AbstractCegarLoop]: Abstraction has 79314 states and 130879 transitions. [2020-10-27 23:30:42,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 79314 states and 130879 transitions. [2020-10-27 23:30:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:30:42,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:42,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:30:42,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:30:42,713 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2068743002, now seen corresponding path program 1 times [2020-10-27 23:30:42,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:42,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941877877] [2020-10-27 23:30:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:42,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:42,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:43,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:48,255 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:30:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:48,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941877877] [2020-10-27 23:30:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:48,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835232206] [2020-10-27 23:30:48,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:48,300 INFO L87 Difference]: Start difference. First operand 79314 states and 130879 transitions. Second operand 4 states. [2020-10-27 23:30:48,816 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:30:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:59,423 INFO L93 Difference]: Finished difference Result 212728 states and 350467 transitions. [2020-10-27 23:30:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:59,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 23:30:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:59,729 INFO L225 Difference]: With dead ends: 212728 [2020-10-27 23:30:59,729 INFO L226 Difference]: Without dead ends: 133681 [2020-10-27 23:30:59,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:31:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133681 states. [2020-10-27 23:31:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133681 to 133621. [2020-10-27 23:31:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133621 states. [2020-10-27 23:31:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133621 states to 133621 states and 219040 transitions. [2020-10-27 23:31:09,953 INFO L78 Accepts]: Start accepts. Automaton has 133621 states and 219040 transitions. Word has length 109 [2020-10-27 23:31:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:09,953 INFO L481 AbstractCegarLoop]: Abstraction has 133621 states and 219040 transitions. [2020-10-27 23:31:09,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 133621 states and 219040 transitions. [2020-10-27 23:31:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:31:09,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:09,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:31:09,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:31:09,956 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1910192576, now seen corresponding path program 1 times [2020-10-27 23:31:09,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:09,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277061338] [2020-10-27 23:31:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:10,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:10,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:13,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:31:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:31:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3723 [2020-10-27 23:31:13,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 23:31:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:31:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:14,232 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:31:14,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:14,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:14,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:14,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:31:14,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277061338] [2020-10-27 23:31:14,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:14,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:14,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978109313] [2020-10-27 23:31:14,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:14,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:14,278 INFO L87 Difference]: Start difference. First operand 133621 states and 219040 transitions. Second operand 4 states. [2020-10-27 23:31:16,230 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:31:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:28,657 INFO L93 Difference]: Finished difference Result 310839 states and 508610 transitions. [2020-10-27 23:31:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:31:28,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 23:31:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:29,157 INFO L225 Difference]: With dead ends: 310839 [2020-10-27 23:31:29,157 INFO L226 Difference]: Without dead ends: 177428 [2020-10-27 23:31:29,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:31:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177428 states. [2020-10-27 23:31:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177428 to 132097. [2020-10-27 23:31:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132097 states. [2020-10-27 23:31:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132097 states to 132097 states and 215990 transitions. [2020-10-27 23:31:39,774 INFO L78 Accepts]: Start accepts. Automaton has 132097 states and 215990 transitions. Word has length 109 [2020-10-27 23:31:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:39,774 INFO L481 AbstractCegarLoop]: Abstraction has 132097 states and 215990 transitions. [2020-10-27 23:31:39,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 132097 states and 215990 transitions. [2020-10-27 23:31:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 23:31:39,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:39,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:31:39,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:31:39,777 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1163016078, now seen corresponding path program 1 times [2020-10-27 23:31:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:39,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226943402] [2020-10-27 23:31:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:39,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:40,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 23:31:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 23:31:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:45,284 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-27 23:31:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:45,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:31:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226943402] [2020-10-27 23:31:45,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:45,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:45,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589785713] [2020-10-27 23:31:45,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:45,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:45,322 INFO L87 Difference]: Start difference. First operand 132097 states and 215990 transitions. Second operand 4 states. [2020-10-27 23:31:45,793 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-27 23:32:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:03,287 INFO L93 Difference]: Finished difference Result 346567 states and 564794 transitions. [2020-10-27 23:32:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:03,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-27 23:32:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:03,701 INFO L225 Difference]: With dead ends: 346567 [2020-10-27 23:32:03,701 INFO L226 Difference]: Without dead ends: 214672 [2020-10-27 23:32:03,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214672 states.