/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=SHALLOWEST --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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:56:28,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:56:28,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:56:28,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:56:28,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:56:28,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:56:28,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:56:28,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:56:28,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:56:28,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:56:28,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:56:28,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:56:28,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:56:28,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:56:28,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:56:28,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:56:28,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:56:28,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:56:28,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:56:28,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:56:28,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:56:28,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:56:28,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:56:28,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:56:28,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:56:28,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:56:28,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:56:28,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:56:28,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:56:28,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:56:28,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:56:28,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:56:28,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:56:28,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:56:28,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:56:28,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:56:28,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:56:28,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:56:28,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:56:28,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:56:28,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:56:28,570 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 05:56:28,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:56:28,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:56:28,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:56:28,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:56:28,603 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:56:28,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:56:28,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:56:28,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:56:28,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:56:28,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:56:28,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:56:28,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:56:28,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:56:28,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:56:28,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:56:28,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:56:28,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:56:28,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:56:28,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:56:28,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:56:28,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:56:28,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:56:28,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:56:28,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:56:28,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:56:28,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:56:28,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:56:28,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:56:28,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:56:28,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:56:28,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:56:28,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:56:29,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:56:29,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:56:29,004 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:56:29,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:56:29,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccddb1e0/aee3fa6b1bb040339837b22fdd767c85/FLAG72a2431a7 [2020-10-27 05:56:29,801 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:56:29,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:56:29,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccddb1e0/aee3fa6b1bb040339837b22fdd767c85/FLAG72a2431a7 [2020-10-27 05:56:30,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccddb1e0/aee3fa6b1bb040339837b22fdd767c85 [2020-10-27 05:56:30,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:56:30,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:56:30,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:56:30,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:56:30,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:56:30,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329a0a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30, skipping insertion in model container [2020-10-27 05:56:30,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:56:30,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:56:30,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:56:30,630 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:56:30,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:56:30,858 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:56:30,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30 WrapperNode [2020-10-27 05:56:30,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:56:30,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:56:30,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:56:30,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:56:30,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (1/1) ... [2020-10-27 05:56:30,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:56:30,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:56:30,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:56:30,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:56:30,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (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 05:56:31,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:56:31,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:56:31,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:56:31,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:56:31,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:56:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:56:31,036 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:56:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:56:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:56:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:56:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:56:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:56:31,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:56:32,058 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:56:32,058 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:56:32,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:56:32 BoogieIcfgContainer [2020-10-27 05:56:32,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:56:32,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:56:32,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:56:32,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:56:32,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:56:30" (1/3) ... [2020-10-27 05:56:32,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1870ccb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:56:32, skipping insertion in model container [2020-10-27 05:56:32,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:30" (2/3) ... [2020-10-27 05:56:32,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1870ccb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:56:32, skipping insertion in model container [2020-10-27 05:56:32,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:56:32" (3/3) ... [2020-10-27 05:56:32,069 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:56:32,081 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:56:32,087 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:56:32,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:56:32,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:56:32,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:56:32,130 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:56:32,130 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:56:32,130 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:56:32,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:56:32,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:56:32,131 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:56:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-10-27 05:56:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:56:32,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:32,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:32,164 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash 110987728, now seen corresponding path program 1 times [2020-10-27 05:56:32,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:32,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11013266] [2020-10-27 05:56:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:32,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:35,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:35,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:56:35,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:56:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-27 05:56:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:35,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 05:56:35,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:56:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:56:35,944 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:35,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:36,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:36,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 05:56:36,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:56:36,172 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 05:56:36,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11013266] [2020-10-27 05:56:36,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:36,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:56:36,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766735916] [2020-10-27 05:56:36,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:56:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:36,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:56:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:56:36,218 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2020-10-27 05:56:36,637 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:37,591 INFO L93 Difference]: Finished difference Result 354 states and 586 transitions. [2020-10-27 05:56:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:56:37,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:56:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:37,608 INFO L225 Difference]: With dead ends: 354 [2020-10-27 05:56:37,608 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 05:56:37,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 05:56:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2020-10-27 05:56:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 05:56:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 370 transitions. [2020-10-27 05:56:37,695 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 370 transitions. Word has length 67 [2020-10-27 05:56:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:37,696 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 370 transitions. [2020-10-27 05:56:37,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:56:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 370 transitions. [2020-10-27 05:56:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:56:37,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:37,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:37,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:56:37,706 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 632904879, now seen corresponding path program 1 times [2020-10-27 05:56:37,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:37,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035022974] [2020-10-27 05:56:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:37,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:42,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:42,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:56:42,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:56:42,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:56:42,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:42,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:42,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:42,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:56:42,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:56:43,250 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:43,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:43,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:43,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:43,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:43,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:43,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:56:43,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:43,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:56:43,314 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 05:56:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035022974] [2020-10-27 05:56:43,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:43,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:43,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698389481] [2020-10-27 05:56:43,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:43,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:43,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:43,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:43,324 INFO L87 Difference]: Start difference. First operand 239 states and 370 transitions. Second operand 5 states. [2020-10-27 05:56:44,855 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:45,012 INFO L93 Difference]: Finished difference Result 682 states and 1057 transitions. [2020-10-27 05:56:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:45,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-27 05:56:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:45,017 INFO L225 Difference]: With dead ends: 682 [2020-10-27 05:56:45,018 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 05:56:45,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:56:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 05:56:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 453. [2020-10-27 05:56:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 05:56:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 698 transitions. [2020-10-27 05:56:45,090 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 698 transitions. Word has length 69 [2020-10-27 05:56:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:45,092 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 698 transitions. [2020-10-27 05:56:45,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 698 transitions. [2020-10-27 05:56:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:56:45,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:45,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:45,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:56:45,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1652771678, now seen corresponding path program 1 times [2020-10-27 05:56:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:45,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42978156] [2020-10-27 05:56:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:46,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:49,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:49,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:56:49,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:56:49,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4577 [2020-10-27 05:56:49,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:56:49,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:50,114 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:50,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:50,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:50,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:50,172 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 05:56:50,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42978156] [2020-10-27 05:56:50,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:50,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:50,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105955648] [2020-10-27 05:56:50,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:50,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:50,177 INFO L87 Difference]: Start difference. First operand 453 states and 698 transitions. Second operand 5 states. [2020-10-27 05:56:51,492 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:51,651 INFO L93 Difference]: Finished difference Result 1307 states and 2015 transitions. [2020-10-27 05:56:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:51,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 05:56:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:51,664 INFO L225 Difference]: With dead ends: 1307 [2020-10-27 05:56:51,664 INFO L226 Difference]: Without dead ends: 868 [2020-10-27 05:56:51,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:56:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2020-10-27 05:56:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 865. [2020-10-27 05:56:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 865 states. [2020-10-27 05:56:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1323 transitions. [2020-10-27 05:56:51,762 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1323 transitions. Word has length 70 [2020-10-27 05:56:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:51,763 INFO L481 AbstractCegarLoop]: Abstraction has 865 states and 1323 transitions. [2020-10-27 05:56:51,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1323 transitions. [2020-10-27 05:56:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:56:51,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:51,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:51,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:56:51,770 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash -631327769, now seen corresponding path program 1 times [2020-10-27 05:56:51,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:51,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534061909] [2020-10-27 05:56:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:56,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:56,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:56:56,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:56:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:56:56,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:56,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:56,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:56,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:56:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:57,355 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:57,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:57,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:56:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:57,408 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 05:56:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534061909] [2020-10-27 05:56:57,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114065757] [2020-10-27 05:56:57,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:57,415 INFO L87 Difference]: Start difference. First operand 865 states and 1323 transitions. Second operand 5 states. [2020-10-27 05:56:57,800 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:59,118 INFO L93 Difference]: Finished difference Result 1542 states and 2336 transitions. [2020-10-27 05:56:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:59,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:56:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:59,125 INFO L225 Difference]: With dead ends: 1542 [2020-10-27 05:56:59,125 INFO L226 Difference]: Without dead ends: 1094 [2020-10-27 05:56:59,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-10-27 05:56:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1091. [2020-10-27 05:56:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-10-27 05:56:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1641 transitions. [2020-10-27 05:56:59,202 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1641 transitions. Word has length 71 [2020-10-27 05:56:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:59,204 INFO L481 AbstractCegarLoop]: Abstraction has 1091 states and 1641 transitions. [2020-10-27 05:56:59,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1641 transitions. [2020-10-27 05:56:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:56:59,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:59,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:59,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:56:59,208 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash -51933586, now seen corresponding path program 1 times [2020-10-27 05:56:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:59,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922922281] [2020-10-27 05:56:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:59,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:59,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:04,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:57:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:57:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:04,783 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:04,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:04,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:04,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:04,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:57:04,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:04,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:04,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:04,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:04,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:57:04,846 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 05:57:04,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922922281] [2020-10-27 05:57:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:04,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121166002] [2020-10-27 05:57:04,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:04,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:04,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:04,848 INFO L87 Difference]: Start difference. First operand 1091 states and 1641 transitions. Second operand 5 states. [2020-10-27 05:57:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:05,889 INFO L93 Difference]: Finished difference Result 1726 states and 2603 transitions. [2020-10-27 05:57:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:57:05,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:57:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:05,894 INFO L225 Difference]: With dead ends: 1726 [2020-10-27 05:57:05,894 INFO L226 Difference]: Without dead ends: 663 [2020-10-27 05:57:05,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:57:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-10-27 05:57:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2020-10-27 05:57:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-10-27 05:57:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1002 transitions. [2020-10-27 05:57:05,947 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1002 transitions. Word has length 71 [2020-10-27 05:57:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:05,947 INFO L481 AbstractCegarLoop]: Abstraction has 663 states and 1002 transitions. [2020-10-27 05:57:05,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1002 transitions. [2020-10-27 05:57:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:57:05,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:05,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:05,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:57:05,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 183707426, now seen corresponding path program 1 times [2020-10-27 05:57:05,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:05,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578425552] [2020-10-27 05:57:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:07,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:07,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:57:07,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:57:07,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:08,197 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:08,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:08,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:08,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:08,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:57:08,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:08,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:08,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:08,251 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 05:57:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578425552] [2020-10-27 05:57:08,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:08,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:57:08,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612655824] [2020-10-27 05:57:08,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:57:08,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:08,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:57:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:57:08,254 INFO L87 Difference]: Start difference. First operand 663 states and 1002 transitions. Second operand 4 states. [2020-10-27 05:57:08,604 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:09,417 INFO L93 Difference]: Finished difference Result 1625 states and 2544 transitions. [2020-10-27 05:57:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:57:09,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 05:57:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:09,426 INFO L225 Difference]: With dead ends: 1625 [2020-10-27 05:57:09,426 INFO L226 Difference]: Without dead ends: 1121 [2020-10-27 05:57:09,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-10-27 05:57:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1112. [2020-10-27 05:57:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2020-10-27 05:57:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1715 transitions. [2020-10-27 05:57:09,504 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1715 transitions. Word has length 71 [2020-10-27 05:57:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:09,505 INFO L481 AbstractCegarLoop]: Abstraction has 1112 states and 1715 transitions. [2020-10-27 05:57:09,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:57:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1715 transitions. [2020-10-27 05:57:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:57:09,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:09,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:09,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:57:09,508 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1086065985, now seen corresponding path program 1 times [2020-10-27 05:57:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:09,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458576532] [2020-10-27 05:57:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:09,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:09,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:09,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:12,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:57:12,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:57:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3217 [2020-10-27 05:57:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:57:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:13,266 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:13,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:13,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:13,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:57:13,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:13,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:57:13,331 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 05:57:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458576532] [2020-10-27 05:57:13,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:13,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:13,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902699075] [2020-10-27 05:57:13,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:13,338 INFO L87 Difference]: Start difference. First operand 1112 states and 1715 transitions. Second operand 5 states. [2020-10-27 05:57:14,743 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:14,987 INFO L93 Difference]: Finished difference Result 3203 states and 4937 transitions. [2020-10-27 05:57:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:14,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:57:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:15,000 INFO L225 Difference]: With dead ends: 3203 [2020-10-27 05:57:15,000 INFO L226 Difference]: Without dead ends: 2122 [2020-10-27 05:57:15,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-10-27 05:57:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2119. [2020-10-27 05:57:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2119 states. [2020-10-27 05:57:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3237 transitions. [2020-10-27 05:57:15,161 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3237 transitions. Word has length 73 [2020-10-27 05:57:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:15,161 INFO L481 AbstractCegarLoop]: Abstraction has 2119 states and 3237 transitions. [2020-10-27 05:57:15,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3237 transitions. [2020-10-27 05:57:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:57:15,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:15,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:15,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:57:15,166 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:15,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1968116531, now seen corresponding path program 1 times [2020-10-27 05:57:15,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:15,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031625581] [2020-10-27 05:57:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:15,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:15,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3124 [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:18,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:57:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:18,724 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:18,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:18,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:18,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:18,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:18,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:57:18,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:18,783 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 05:57:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031625581] [2020-10-27 05:57:18,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:18,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:18,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362446811] [2020-10-27 05:57:18,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:18,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:18,792 INFO L87 Difference]: Start difference. First operand 2119 states and 3237 transitions. Second operand 5 states. [2020-10-27 05:57:20,382 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:20,736 INFO L93 Difference]: Finished difference Result 6116 states and 9336 transitions. [2020-10-27 05:57:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:20,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-27 05:57:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:20,764 INFO L225 Difference]: With dead ends: 6116 [2020-10-27 05:57:20,765 INFO L226 Difference]: Without dead ends: 4069 [2020-10-27 05:57:20,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2020-10-27 05:57:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 4066. [2020-10-27 05:57:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4066 states. [2020-10-27 05:57:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 6164 transitions. [2020-10-27 05:57:21,104 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 6164 transitions. Word has length 74 [2020-10-27 05:57:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 4066 states and 6164 transitions. [2020-10-27 05:57:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 6164 transitions. [2020-10-27 05:57:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:57:21,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:21,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:21,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:57:21,112 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1671544512, now seen corresponding path program 1 times [2020-10-27 05:57:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:21,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131431212] [2020-10-27 05:57:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:21,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:26,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:57:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 05:57:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:26,570 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:26,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:26,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:26,607 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 05:57:26,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131431212] [2020-10-27 05:57:26,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:26,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902587336] [2020-10-27 05:57:26,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:26,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:26,609 INFO L87 Difference]: Start difference. First operand 4066 states and 6164 transitions. Second operand 5 states. [2020-10-27 05:57:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:27,628 INFO L93 Difference]: Finished difference Result 7138 states and 10807 transitions. [2020-10-27 05:57:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:57:27,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:57:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:27,645 INFO L225 Difference]: With dead ends: 7138 [2020-10-27 05:57:27,645 INFO L226 Difference]: Without dead ends: 3125 [2020-10-27 05:57:27,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:57:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2020-10-27 05:57:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3124. [2020-10-27 05:57:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3124 states. [2020-10-27 05:57:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 4714 transitions. [2020-10-27 05:57:27,897 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 4714 transitions. Word has length 75 [2020-10-27 05:57:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:27,898 INFO L481 AbstractCegarLoop]: Abstraction has 3124 states and 4714 transitions. [2020-10-27 05:57:27,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 4714 transitions. [2020-10-27 05:57:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:57:27,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:27,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:27,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:57:27,903 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 715991079, now seen corresponding path program 1 times [2020-10-27 05:57:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165351247] [2020-10-27 05:57:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:28,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:29,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:32,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:57:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:33,323 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:33,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:33,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:33,363 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 05:57:33,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165351247] [2020-10-27 05:57:33,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:33,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430341710] [2020-10-27 05:57:33,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:33,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:33,365 INFO L87 Difference]: Start difference. First operand 3124 states and 4714 transitions. Second operand 5 states. [2020-10-27 05:57:33,747 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:35,295 INFO L93 Difference]: Finished difference Result 5767 states and 8643 transitions. [2020-10-27 05:57:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:57:35,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:57:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:35,312 INFO L225 Difference]: With dead ends: 5767 [2020-10-27 05:57:35,312 INFO L226 Difference]: Without dead ends: 3678 [2020-10-27 05:57:35,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2020-10-27 05:57:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3675. [2020-10-27 05:57:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2020-10-27 05:57:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5465 transitions. [2020-10-27 05:57:35,618 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5465 transitions. Word has length 75 [2020-10-27 05:57:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:35,619 INFO L481 AbstractCegarLoop]: Abstraction has 3675 states and 5465 transitions. [2020-10-27 05:57:35,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5465 transitions. [2020-10-27 05:57:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:57:35,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:35,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:35,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:57:35,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1381098740, now seen corresponding path program 1 times [2020-10-27 05:57:35,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:35,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290215638] [2020-10-27 05:57:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:35,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:36,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:37,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:37,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:57:37,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:57:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:37,420 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:37,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:37,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:37,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:37,460 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 05:57:37,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290215638] [2020-10-27 05:57:37,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:37,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:57:37,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947862819] [2020-10-27 05:57:37,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:57:37,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:57:37,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:57:37,463 INFO L87 Difference]: Start difference. First operand 3675 states and 5465 transitions. Second operand 4 states. [2020-10-27 05:57:37,834 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:39,002 INFO L93 Difference]: Finished difference Result 9400 states and 14378 transitions. [2020-10-27 05:57:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:57:39,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-27 05:57:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:39,028 INFO L225 Difference]: With dead ends: 9400 [2020-10-27 05:57:39,028 INFO L226 Difference]: Without dead ends: 6298 [2020-10-27 05:57:39,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2020-10-27 05:57:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 6256. [2020-10-27 05:57:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6256 states. [2020-10-27 05:57:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6256 states to 6256 states and 9442 transitions. [2020-10-27 05:57:39,603 INFO L78 Accepts]: Start accepts. Automaton has 6256 states and 9442 transitions. Word has length 75 [2020-10-27 05:57:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:39,603 INFO L481 AbstractCegarLoop]: Abstraction has 6256 states and 9442 transitions. [2020-10-27 05:57:39,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:57:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6256 states and 9442 transitions. [2020-10-27 05:57:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:57:39,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:39,612 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] [2020-10-27 05:57:39,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:57:39,613 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1422199955, now seen corresponding path program 1 times [2020-10-27 05:57:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:39,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355782796] [2020-10-27 05:57:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:39,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:42,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:42,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3068 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:57:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:43,064 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:43,098 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 05:57:43,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355782796] [2020-10-27 05:57:43,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:43,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842881208] [2020-10-27 05:57:43,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:43,100 INFO L87 Difference]: Start difference. First operand 6256 states and 9442 transitions. Second operand 5 states. [2020-10-27 05:57:44,308 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:44,796 INFO L93 Difference]: Finished difference Result 16454 states and 24814 transitions. [2020-10-27 05:57:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:44,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 05:57:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:44,827 INFO L225 Difference]: With dead ends: 16454 [2020-10-27 05:57:44,827 INFO L226 Difference]: Without dead ends: 10322 [2020-10-27 05:57:44,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10322 states. [2020-10-27 05:57:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10322 to 10319. [2020-10-27 05:57:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10319 states. [2020-10-27 05:57:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 15414 transitions. [2020-10-27 05:57:45,699 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 15414 transitions. Word has length 77 [2020-10-27 05:57:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 10319 states and 15414 transitions. [2020-10-27 05:57:45,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 15414 transitions. [2020-10-27 05:57:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:57:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:45,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:45,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:57:45,709 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1325806251, now seen corresponding path program 1 times [2020-10-27 05:57:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:45,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231402074] [2020-10-27 05:57:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:45,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:45,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2925 [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:57:48,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:49,043 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:49,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:49,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:49,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:49,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:49,086 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 05:57:49,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231402074] [2020-10-27 05:57:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:49,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:49,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883873376] [2020-10-27 05:57:49,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:49,088 INFO L87 Difference]: Start difference. First operand 10319 states and 15414 transitions. Second operand 5 states. [2020-10-27 05:57:50,553 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:51,292 INFO L93 Difference]: Finished difference Result 26474 states and 39553 transitions. [2020-10-27 05:57:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:51,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-27 05:57:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:51,334 INFO L225 Difference]: With dead ends: 26474 [2020-10-27 05:57:51,334 INFO L226 Difference]: Without dead ends: 16452 [2020-10-27 05:57:51,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16452 states. [2020-10-27 05:57:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16452 to 16449. [2020-10-27 05:57:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16449 states. [2020-10-27 05:57:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16449 states to 16449 states and 24265 transitions. [2020-10-27 05:57:52,577 INFO L78 Accepts]: Start accepts. Automaton has 16449 states and 24265 transitions. Word has length 78 [2020-10-27 05:57:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:52,577 INFO L481 AbstractCegarLoop]: Abstraction has 16449 states and 24265 transitions. [2020-10-27 05:57:52,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16449 states and 24265 transitions. [2020-10-27 05:57:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:57:52,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:52,590 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] [2020-10-27 05:57:52,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:57:52,590 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -451506234, now seen corresponding path program 1 times [2020-10-27 05:57:52,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:52,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168308939] [2020-10-27 05:57:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:52,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:52,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:54,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:54,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:57:54,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:57:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-27 05:57:54,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:57:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:57:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:57:54,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:54,457 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:54,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:54,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:54,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:54,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:54,487 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 05:57:54,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168308939] [2020-10-27 05:57:54,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:54,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:57:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993136289] [2020-10-27 05:57:54,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:57:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:57:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:57:54,489 INFO L87 Difference]: Start difference. First operand 16449 states and 24265 transitions. Second operand 6 states. [2020-10-27 05:57:54,870 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:56,563 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:57:56,975 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:57,957 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:57:58,529 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:58:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:01,100 INFO L93 Difference]: Finished difference Result 71177 states and 108116 transitions. [2020-10-27 05:58:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:58:01,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 05:58:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:01,251 INFO L225 Difference]: With dead ends: 71177 [2020-10-27 05:58:01,252 INFO L226 Difference]: Without dead ends: 56119 [2020-10-27 05:58:01,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:58:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56119 states. [2020-10-27 05:58:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56119 to 29746. [2020-10-27 05:58:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29746 states. [2020-10-27 05:58:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29746 states to 29746 states and 44280 transitions. [2020-10-27 05:58:03,860 INFO L78 Accepts]: Start accepts. Automaton has 29746 states and 44280 transitions. Word has length 79 [2020-10-27 05:58:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:03,860 INFO L481 AbstractCegarLoop]: Abstraction has 29746 states and 44280 transitions. [2020-10-27 05:58:03,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:58:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29746 states and 44280 transitions. [2020-10-27 05:58:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:58:03,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:03,880 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] [2020-10-27 05:58:03,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:58:03,880 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:03,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1272907446, now seen corresponding path program 1 times [2020-10-27 05:58:03,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:03,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414919320] [2020-10-27 05:58:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:03,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:03,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:04,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:07,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:58:07,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:58:07,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3247 [2020-10-27 05:58:07,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:58:07,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:58:07,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:07,517 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:58:07,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:07,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:07,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:07,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:58:07,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:07,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:07,558 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 05:58:07,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414919320] [2020-10-27 05:58:07,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:07,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:07,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141317117] [2020-10-27 05:58:07,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:07,561 INFO L87 Difference]: Start difference. First operand 29746 states and 44280 transitions. Second operand 5 states. [2020-10-27 05:58:07,950 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:58:09,881 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:58:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:12,994 INFO L93 Difference]: Finished difference Result 83967 states and 127188 transitions. [2020-10-27 05:58:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:58:12,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-27 05:58:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:13,101 INFO L225 Difference]: With dead ends: 83967 [2020-10-27 05:58:13,101 INFO L226 Difference]: Without dead ends: 55612 [2020-10-27 05:58:13,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:58:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55612 states. [2020-10-27 05:58:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55612 to 42501. [2020-10-27 05:58:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42501 states. [2020-10-27 05:58:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42501 states to 42501 states and 63576 transitions. [2020-10-27 05:58:16,979 INFO L78 Accepts]: Start accepts. Automaton has 42501 states and 63576 transitions. Word has length 80 [2020-10-27 05:58:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:16,979 INFO L481 AbstractCegarLoop]: Abstraction has 42501 states and 63576 transitions. [2020-10-27 05:58:16,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 42501 states and 63576 transitions. [2020-10-27 05:58:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:58:16,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:16,993 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] [2020-10-27 05:58:16,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:58:16,993 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash -963544609, now seen corresponding path program 1 times [2020-10-27 05:58:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:16,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943647937] [2020-10-27 05:58:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:17,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:19,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:58:19,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:58:19,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2410 [2020-10-27 05:58:19,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:58:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:58:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:58:19,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:19,811 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:58:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:19,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:19,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:19,839 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 05:58:19,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943647937] [2020-10-27 05:58:19,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:19,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:58:19,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368955149] [2020-10-27 05:58:19,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:58:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:58:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:19,842 INFO L87 Difference]: Start difference. First operand 42501 states and 63576 transitions. Second operand 7 states. [2020-10-27 05:58:20,259 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:58:22,403 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:58:22,785 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:58:23,237 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:58:23,965 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:58:24,359 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:58:25,836 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:58:35,947 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:58:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:37,819 INFO L93 Difference]: Finished difference Result 202939 states and 305078 transitions. [2020-10-27 05:58:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:58:37,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-27 05:58:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:38,112 INFO L225 Difference]: With dead ends: 202939 [2020-10-27 05:58:38,112 INFO L226 Difference]: Without dead ends: 161829 [2020-10-27 05:58:38,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:58:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161829 states. [2020-10-27 05:58:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161829 to 122860. [2020-10-27 05:58:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122860 states. [2020-10-27 05:58:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122860 states to 122860 states and 182240 transitions. [2020-10-27 05:58:49,890 INFO L78 Accepts]: Start accepts. Automaton has 122860 states and 182240 transitions. Word has length 81 [2020-10-27 05:58:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:49,891 INFO L481 AbstractCegarLoop]: Abstraction has 122860 states and 182240 transitions. [2020-10-27 05:58:49,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:58:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 122860 states and 182240 transitions. [2020-10-27 05:58:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:58:49,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:49,912 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] [2020-10-27 05:58:49,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:58:49,913 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1432782865, now seen corresponding path program 1 times [2020-10-27 05:58:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:49,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665222535] [2020-10-27 05:58:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:52,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:58:52,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2824 [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:58:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:53,162 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:58:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:53,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:53,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:53,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:58:53,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:53,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:53,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:53,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:53,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:53,191 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 05:58:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665222535] [2020-10-27 05:58:53,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:53,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:58:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727553794] [2020-10-27 05:58:53,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:58:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:58:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:53,193 INFO L87 Difference]: Start difference. First operand 122860 states and 182240 transitions. Second operand 7 states. [2020-10-27 05:58:53,621 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:58:55,818 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:58:56,190 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:58:56,673 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:58:57,828 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:58:58,226 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:58:59,731 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:59:22,612 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:59:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:37,446 INFO L93 Difference]: Finished difference Result 541049 states and 806179 transitions. [2020-10-27 05:59:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:59:37,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-27 05:59:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:38,392 INFO L225 Difference]: With dead ends: 541049 [2020-10-27 05:59:38,393 INFO L226 Difference]: Without dead ends: 429409 [2020-10-27 05:59:38,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:59:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429409 states.