/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:17:54,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:17:54,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:17:54,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:17:54,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:17:54,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:17:54,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:17:54,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:17:54,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:17:54,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:17:54,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:17:54,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:17:54,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:17:54,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:17:54,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:17:54,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:17:54,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:17:54,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:17:54,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:17:54,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:17:54,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:17:54,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:17:54,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:17:54,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:17:54,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:17:54,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:17:54,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:17:54,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:17:54,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:17:54,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:17:54,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:17:54,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:17:54,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:17:54,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:17:54,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:17:54,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:17:54,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:17:54,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:17:54,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:17:54,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:17:54,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:17:54,441 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 [2020-10-28 00:17:54,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:17:54,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:17:54,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:17:54,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:17:54,493 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:17:54,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:17:54,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:17:54,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:17:54,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:17:54,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:17:54,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:17:54,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:17:54,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:17:54,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:17:54,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:17:54,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:17:54,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:17:54,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:17:54,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:17:54,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:17:54,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:17:54,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:17:54,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:17:54,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:17:54,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:17:54,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:17:54,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:17:54,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:17:54,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:17:54,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:17:54,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:17:54,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:17:54,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:17:54,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:17:54,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:17:54,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:17:55,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ff0c598/a37671bf5bf64466af4850c96d41877a/FLAG19fc79278 [2020-10-28 00:17:55,746 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:17:55,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:17:55,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ff0c598/a37671bf5bf64466af4850c96d41877a/FLAG19fc79278 [2020-10-28 00:17:56,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ff0c598/a37671bf5bf64466af4850c96d41877a [2020-10-28 00:17:56,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:17:56,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:17:56,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:17:56,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:17:56,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:17:56,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b1abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56, skipping insertion in model container [2020-10-28 00:17:56,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:17:56,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:17:56,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:17:56,560 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:17:56,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:17:56,736 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:17:56,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56 WrapperNode [2020-10-28 00:17:56,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:17:56,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:17:56,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:17:56,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:17:56,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (1/1) ... [2020-10-28 00:17:56,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:17:56,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:17:56,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:17:56,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:17:56,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (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 [2020-10-28 00:17:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:17:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:17:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:17:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:17:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:17:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:17:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:17:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:17:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:17:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:17:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:17:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:17:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:17:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:17:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:17:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:17:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:17:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:17:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:17:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:17:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:17:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:17:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:17:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:17:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:17:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:17:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:17:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:17:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:17:57,961 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:17:57,962 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:17:57,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:17:57 BoogieIcfgContainer [2020-10-28 00:17:57,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:17:57,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:17:57,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:17:57,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:17:57,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:17:56" (1/3) ... [2020-10-28 00:17:57,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6667f3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:17:57, skipping insertion in model container [2020-10-28 00:17:57,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56" (2/3) ... [2020-10-28 00:17:57,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6667f3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:17:57, skipping insertion in model container [2020-10-28 00:17:57,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:17:57" (3/3) ... [2020-10-28 00:17:57,973 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 00:17:57,985 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:17:57,991 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:17:58,005 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:17:58,032 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:17:58,032 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:17:58,032 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:17:58,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:17:58,033 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:17:58,033 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:17:58,033 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:17:58,033 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:17:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-28 00:17:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:17:58,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:58,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:17:58,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash 818380633, now seen corresponding path program 1 times [2020-10-28 00:17:58,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:58,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628672785] [2020-10-28 00:17:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:58,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:58,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:00,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:03,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:03,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:18:03,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:03,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:18:03,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:18:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:03,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:18:03,767 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:03,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:03,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:03,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:03,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:18:03,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:03,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:03,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:03,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628672785] [2020-10-28 00:18:03,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:03,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845694100] [2020-10-28 00:18:03,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:03,869 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-28 00:18:04,239 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:05,054 INFO L93 Difference]: Finished difference Result 320 states and 513 transitions. [2020-10-28 00:18:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:05,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:18:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:05,077 INFO L225 Difference]: With dead ends: 320 [2020-10-28 00:18:05,077 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 00:18:05,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 00:18:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-28 00:18:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 00:18:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 308 transitions. [2020-10-28 00:18:05,202 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 308 transitions. Word has length 65 [2020-10-28 00:18:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:05,204 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 308 transitions. [2020-10-28 00:18:05,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 308 transitions. [2020-10-28 00:18:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 00:18:05,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:05,208 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] [2020-10-28 00:18:05,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:18:05,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1667730604, now seen corresponding path program 1 times [2020-10-28 00:18:05,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:05,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539040579] [2020-10-28 00:18:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:05,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:05,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:09,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:09,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 00:18:09,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:18:09,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3876 [2020-10-28 00:18:09,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:18:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 00:18:09,505 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:09,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:09,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:09,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:09,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:09,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:18:09,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:09,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:09,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:09,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:09,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:09,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539040579] [2020-10-28 00:18:09,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:09,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:09,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083888284] [2020-10-28 00:18:09,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:09,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:09,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:09,557 INFO L87 Difference]: Start difference. First operand 208 states and 308 transitions. Second operand 4 states. [2020-10-28 00:18:09,921 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:10,700 INFO L93 Difference]: Finished difference Result 514 states and 794 transitions. [2020-10-28 00:18:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:10,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 00:18:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:10,715 INFO L225 Difference]: With dead ends: 514 [2020-10-28 00:18:10,716 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 00:18:10,720 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 [2020-10-28 00:18:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 00:18:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-10-28 00:18:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-28 00:18:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 521 transitions. [2020-10-28 00:18:10,759 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 521 transitions. Word has length 66 [2020-10-28 00:18:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:10,759 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 521 transitions. [2020-10-28 00:18:10,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 521 transitions. [2020-10-28 00:18:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:18:10,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:10,762 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] [2020-10-28 00:18:10,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:18:10,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -764041328, now seen corresponding path program 1 times [2020-10-28 00:18:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:10,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989268428] [2020-10-28 00:18:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:11,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:12,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:12,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:18:12,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:18:12,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1771 [2020-10-28 00:18:12,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:12,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:18:12,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:12,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:18:12,888 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:12,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:12,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:12,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:12,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:18:12,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:12,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:12,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:12,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:12,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:12,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989268428] [2020-10-28 00:18:12,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:12,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773766990] [2020-10-28 00:18:12,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:12,944 INFO L87 Difference]: Start difference. First operand 342 states and 521 transitions. Second operand 4 states. [2020-10-28 00:18:13,265 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:14,070 INFO L93 Difference]: Finished difference Result 884 states and 1381 transitions. [2020-10-28 00:18:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:14,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 00:18:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:14,077 INFO L225 Difference]: With dead ends: 884 [2020-10-28 00:18:14,077 INFO L226 Difference]: Without dead ends: 581 [2020-10-28 00:18:14,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-10-28 00:18:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 578. [2020-10-28 00:18:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-28 00:18:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 893 transitions. [2020-10-28 00:18:14,121 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 893 transitions. Word has length 67 [2020-10-28 00:18:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:14,122 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 893 transitions. [2020-10-28 00:18:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 893 transitions. [2020-10-28 00:18:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:18:14,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:14,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:14,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:18:14,125 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1995530445, now seen corresponding path program 1 times [2020-10-28 00:18:14,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:14,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519157308] [2020-10-28 00:18:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:14,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:14,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:18:14,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:18:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-28 00:18:15,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:18:15,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:15,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:15,295 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:15,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:15,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:18:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:15,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519157308] [2020-10-28 00:18:15,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:15,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:15,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375073495] [2020-10-28 00:18:15,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:15,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:15,343 INFO L87 Difference]: Start difference. First operand 578 states and 893 transitions. Second operand 4 states. [2020-10-28 00:18:15,658 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:16,500 INFO L93 Difference]: Finished difference Result 1528 states and 2393 transitions. [2020-10-28 00:18:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:16,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:18:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:16,507 INFO L225 Difference]: With dead ends: 1528 [2020-10-28 00:18:16,507 INFO L226 Difference]: Without dead ends: 989 [2020-10-28 00:18:16,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2020-10-28 00:18:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 986. [2020-10-28 00:18:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 986 states. [2020-10-28 00:18:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1529 transitions. [2020-10-28 00:18:16,573 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1529 transitions. Word has length 68 [2020-10-28 00:18:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:16,573 INFO L481 AbstractCegarLoop]: Abstraction has 986 states and 1529 transitions. [2020-10-28 00:18:16,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1529 transitions. [2020-10-28 00:18:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:18:16,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:16,576 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] [2020-10-28 00:18:16,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:18:16,577 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 776688091, now seen corresponding path program 1 times [2020-10-28 00:18:16,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:16,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368815846] [2020-10-28 00:18:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:17,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:17,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:18:17,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:17,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-28 00:18:17,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:18:17,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:18:17,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:17,443 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:17,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:17,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:17,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:17,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:17,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:18:17,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368815846] [2020-10-28 00:18:17,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:17,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96900783] [2020-10-28 00:18:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:17,498 INFO L87 Difference]: Start difference. First operand 986 states and 1529 transitions. Second operand 4 states. [2020-10-28 00:18:17,841 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:18,720 INFO L93 Difference]: Finished difference Result 2704 states and 4221 transitions. [2020-10-28 00:18:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:18,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:18:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:18,731 INFO L225 Difference]: With dead ends: 2704 [2020-10-28 00:18:18,732 INFO L226 Difference]: Without dead ends: 1757 [2020-10-28 00:18:18,735 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 [2020-10-28 00:18:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2020-10-28 00:18:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1754. [2020-10-28 00:18:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1754 states. [2020-10-28 00:18:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2713 transitions. [2020-10-28 00:18:18,835 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2713 transitions. Word has length 69 [2020-10-28 00:18:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:18,835 INFO L481 AbstractCegarLoop]: Abstraction has 1754 states and 2713 transitions. [2020-10-28 00:18:18,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2713 transitions. [2020-10-28 00:18:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:18:18,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:18,837 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] [2020-10-28 00:18:18,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:18:18,838 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2047637936, now seen corresponding path program 1 times [2020-10-28 00:18:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:18,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049639461] [2020-10-28 00:18:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:19,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:19,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:18:19,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:18:19,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:20,319 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:20,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:20,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:20,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:20,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:20,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:20,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:20,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049639461] [2020-10-28 00:18:20,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:20,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:18:20,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172380216] [2020-10-28 00:18:20,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:18:20,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:18:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:18:20,372 INFO L87 Difference]: Start difference. First operand 1754 states and 2713 transitions. Second operand 8 states. [2020-10-28 00:18:20,755 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 00:18:21,840 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:22,194 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:22,492 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:18:22,781 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:18:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:23,136 INFO L93 Difference]: Finished difference Result 12044 states and 18757 transitions. [2020-10-28 00:18:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:18:23,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 00:18:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:23,198 INFO L225 Difference]: With dead ends: 12044 [2020-10-28 00:18:23,198 INFO L226 Difference]: Without dead ends: 10329 [2020-10-28 00:18:23,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 00:18:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2020-10-28 00:18:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 3466. [2020-10-28 00:18:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2020-10-28 00:18:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 5321 transitions. [2020-10-28 00:18:23,615 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 5321 transitions. Word has length 69 [2020-10-28 00:18:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:23,616 INFO L481 AbstractCegarLoop]: Abstraction has 3466 states and 5321 transitions. [2020-10-28 00:18:23,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:18:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 5321 transitions. [2020-10-28 00:18:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:18:23,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:23,617 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] [2020-10-28 00:18:23,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:18:23,618 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525504, now seen corresponding path program 1 times [2020-10-28 00:18:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:23,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74341365] [2020-10-28 00:18:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:24,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:24,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:18:24,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:18:24,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:24,611 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:24,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:24,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:24,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:24,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:24,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 00:18:24,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:24,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74341365] [2020-10-28 00:18:24,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:24,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:18:24,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861639190] [2020-10-28 00:18:24,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:18:24,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:18:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:24,675 INFO L87 Difference]: Start difference. First operand 3466 states and 5321 transitions. Second operand 5 states. [2020-10-28 00:18:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:26,072 INFO L93 Difference]: Finished difference Result 7021 states and 10731 transitions. [2020-10-28 00:18:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:18:26,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:18:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:26,111 INFO L225 Difference]: With dead ends: 7021 [2020-10-28 00:18:26,111 INFO L226 Difference]: Without dead ends: 7018 [2020-10-28 00:18:26,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:18:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2020-10-28 00:18:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 3594. [2020-10-28 00:18:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3594 states. [2020-10-28 00:18:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5449 transitions. [2020-10-28 00:18:26,480 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5449 transitions. Word has length 70 [2020-10-28 00:18:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:26,481 INFO L481 AbstractCegarLoop]: Abstraction has 3594 states and 5449 transitions. [2020-10-28 00:18:26,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:18:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5449 transitions. [2020-10-28 00:18:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:18:26,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:26,483 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] [2020-10-28 00:18:26,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:18:26,484 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 344284897, now seen corresponding path program 1 times [2020-10-28 00:18:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:26,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662670544] [2020-10-28 00:18:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:26,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:27,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:27,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:18:27,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:27,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-28 00:18:27,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:18:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:18:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 00:18:27,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:27,644 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:27,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:27,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:27,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:27,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662670544] [2020-10-28 00:18:27,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:27,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:18:27,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680825235] [2020-10-28 00:18:27,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:18:27,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:18:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:18:27,733 INFO L87 Difference]: Start difference. First operand 3594 states and 5449 transitions. Second operand 8 states. [2020-10-28 00:18:28,718 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 00:18:29,056 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 00:18:29,364 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:18:29,687 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 00:18:30,016 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 00:18:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:31,949 INFO L93 Difference]: Finished difference Result 18809 states and 28275 transitions. [2020-10-28 00:18:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:18:31,949 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-28 00:18:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:32,007 INFO L225 Difference]: With dead ends: 18809 [2020-10-28 00:18:32,007 INFO L226 Difference]: Without dead ends: 15254 [2020-10-28 00:18:32,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:18:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15254 states. [2020-10-28 00:18:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15254 to 15242. [2020-10-28 00:18:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15242 states. [2020-10-28 00:18:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15242 states to 15242 states and 22793 transitions. [2020-10-28 00:18:33,435 INFO L78 Accepts]: Start accepts. Automaton has 15242 states and 22793 transitions. Word has length 71 [2020-10-28 00:18:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:33,435 INFO L481 AbstractCegarLoop]: Abstraction has 15242 states and 22793 transitions. [2020-10-28 00:18:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:18:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15242 states and 22793 transitions. [2020-10-28 00:18:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:18:33,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:33,437 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] [2020-10-28 00:18:33,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:18:33,437 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1767442904, now seen corresponding path program 1 times [2020-10-28 00:18:33,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:33,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361673810] [2020-10-28 00:18:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:33,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:33,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:33,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:18:33,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:33,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-28 00:18:33,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:18:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 00:18:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:18:34,278 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:34,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:34,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:34,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361673810] [2020-10-28 00:18:34,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:34,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:34,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598913350] [2020-10-28 00:18:34,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:34,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:34,316 INFO L87 Difference]: Start difference. First operand 15242 states and 22793 transitions. Second operand 4 states. [2020-10-28 00:18:34,603 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:18:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:36,493 INFO L93 Difference]: Finished difference Result 37122 states and 55503 transitions. [2020-10-28 00:18:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:36,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:18:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:36,548 INFO L225 Difference]: With dead ends: 37122 [2020-10-28 00:18:36,548 INFO L226 Difference]: Without dead ends: 21919 [2020-10-28 00:18:36,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21919 states. [2020-10-28 00:18:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21919 to 21916. [2020-10-28 00:18:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21916 states. [2020-10-28 00:18:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21916 states to 21916 states and 32603 transitions. [2020-10-28 00:18:38,215 INFO L78 Accepts]: Start accepts. Automaton has 21916 states and 32603 transitions. Word has length 73 [2020-10-28 00:18:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:38,215 INFO L481 AbstractCegarLoop]: Abstraction has 21916 states and 32603 transitions. [2020-10-28 00:18:38,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21916 states and 32603 transitions. [2020-10-28 00:18:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 00:18:38,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:38,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:38,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:18:38,231 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash 870439456, now seen corresponding path program 1 times [2020-10-28 00:18:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:38,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130229091] [2020-10-28 00:18:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:38,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:38,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:38,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 00:18:38,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:18:38,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-28 00:18:38,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:18:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:18:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 00:18:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:39,245 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:39,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:39,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:18:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130229091] [2020-10-28 00:18:39,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:18:39,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:18:39,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119341078] [2020-10-28 00:18:39,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:18:39,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:39,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:18:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:39,316 INFO L87 Difference]: Start difference. First operand 21916 states and 32603 transitions. Second operand 5 states. [2020-10-28 00:18:39,640 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:18:40,980 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:18:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:43,080 INFO L93 Difference]: Finished difference Result 51621 states and 77025 transitions. [2020-10-28 00:18:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:18:43,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-28 00:18:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:43,163 INFO L225 Difference]: With dead ends: 51621 [2020-10-28 00:18:43,163 INFO L226 Difference]: Without dead ends: 36418 [2020-10-28 00:18:43,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:18:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36418 states. [2020-10-28 00:18:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36418 to 36412. [2020-10-28 00:18:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36412 states. [2020-10-28 00:18:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36412 states to 36412 states and 53947 transitions. [2020-10-28 00:18:46,185 INFO L78 Accepts]: Start accepts. Automaton has 36412 states and 53947 transitions. Word has length 98 [2020-10-28 00:18:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:46,186 INFO L481 AbstractCegarLoop]: Abstraction has 36412 states and 53947 transitions. [2020-10-28 00:18:46,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:18:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 36412 states and 53947 transitions. [2020-10-28 00:18:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:18:46,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:46,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:46,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:18:46,202 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:46,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1294633231, now seen corresponding path program 1 times [2020-10-28 00:18:46,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:46,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182121755] [2020-10-28 00:18:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:51,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:51,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:18:51,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:18:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:51,554 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:18:51,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:51,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:51,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:51,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182121755] [2020-10-28 00:18:51,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:51,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:51,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738419333] [2020-10-28 00:18:51,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:51,598 INFO L87 Difference]: Start difference. First operand 36412 states and 53947 transitions. Second operand 4 states. [2020-10-28 00:18:51,928 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:18:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:56,654 INFO L93 Difference]: Finished difference Result 95042 states and 140799 transitions. [2020-10-28 00:18:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:56,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 00:18:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:56,793 INFO L225 Difference]: With dead ends: 95042 [2020-10-28 00:18:56,793 INFO L226 Difference]: Without dead ends: 64703 [2020-10-28 00:18:56,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64703 states. [2020-10-28 00:19:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64703 to 64700. [2020-10-28 00:19:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64700 states. [2020-10-28 00:19:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64700 states to 64700 states and 95067 transitions. [2020-10-28 00:19:01,574 INFO L78 Accepts]: Start accepts. Automaton has 64700 states and 95067 transitions. Word has length 99 [2020-10-28 00:19:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:01,575 INFO L481 AbstractCegarLoop]: Abstraction has 64700 states and 95067 transitions. [2020-10-28 00:19:01,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 64700 states and 95067 transitions. [2020-10-28 00:19:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:19:01,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:01,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:01,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:19:01,596 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash -546808655, now seen corresponding path program 1 times [2020-10-28 00:19:01,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:01,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706895279] [2020-10-28 00:19:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:01,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:03,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:06,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:06,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:19:06,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:19:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:19:06,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:19:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:19:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:06,952 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:06,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:06,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:06,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:06,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706895279] [2020-10-28 00:19:06,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:06,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070725449] [2020-10-28 00:19:06,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:06,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:06,989 INFO L87 Difference]: Start difference. First operand 64700 states and 95067 transitions. Second operand 4 states. [2020-10-28 00:19:07,294 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:13,530 INFO L93 Difference]: Finished difference Result 145592 states and 213780 transitions. [2020-10-28 00:19:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:13,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 00:19:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:13,913 INFO L225 Difference]: With dead ends: 145592 [2020-10-28 00:19:13,913 INFO L226 Difference]: Without dead ends: 100181 [2020-10-28 00:19:13,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100181 states. [2020-10-28 00:19:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100181 to 94610. [2020-10-28 00:19:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94610 states. [2020-10-28 00:19:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94610 states to 94610 states and 137680 transitions. [2020-10-28 00:19:20,776 INFO L78 Accepts]: Start accepts. Automaton has 94610 states and 137680 transitions. Word has length 99 [2020-10-28 00:19:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:20,776 INFO L481 AbstractCegarLoop]: Abstraction has 94610 states and 137680 transitions. [2020-10-28 00:19:20,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 94610 states and 137680 transitions. [2020-10-28 00:19:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:19:20,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:20,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:20,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:19:20,804 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash 865855282, now seen corresponding path program 1 times [2020-10-28 00:19:20,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:20,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587231613] [2020-10-28 00:19:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:22,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:19:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:26,152 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:26,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:26,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:26,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587231613] [2020-10-28 00:19:26,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:26,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:26,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057333078] [2020-10-28 00:19:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:26,196 INFO L87 Difference]: Start difference. First operand 94610 states and 137680 transitions. Second operand 4 states. [2020-10-28 00:19:26,540 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:35,327 INFO L93 Difference]: Finished difference Result 191036 states and 277094 transitions. [2020-10-28 00:19:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:35,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 00:19:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:35,836 INFO L225 Difference]: With dead ends: 191036 [2020-10-28 00:19:35,836 INFO L226 Difference]: Without dead ends: 132089 [2020-10-28 00:19:35,904 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 [2020-10-28 00:19:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132089 states. [2020-10-28 00:19:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132089 to 126518. [2020-10-28 00:19:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126518 states. [2020-10-28 00:19:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126518 states to 126518 states and 181762 transitions. [2020-10-28 00:19:44,998 INFO L78 Accepts]: Start accepts. Automaton has 126518 states and 181762 transitions. Word has length 99 [2020-10-28 00:19:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:44,998 INFO L481 AbstractCegarLoop]: Abstraction has 126518 states and 181762 transitions. [2020-10-28 00:19:44,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 126518 states and 181762 transitions. [2020-10-28 00:19:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:19:45,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:45,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:45,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:19:45,244 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1341153591, now seen corresponding path program 1 times [2020-10-28 00:19:45,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:45,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765636919] [2020-10-28 00:19:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:45,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-28 00:19:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:19:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:50,572 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:50,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:50,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765636919] [2020-10-28 00:19:50,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:50,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789844735] [2020-10-28 00:19:50,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:50,600 INFO L87 Difference]: Start difference. First operand 126518 states and 181762 transitions. Second operand 4 states. [2020-10-28 00:19:50,945 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:20:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:00,836 INFO L93 Difference]: Finished difference Result 202274 states and 289336 transitions. [2020-10-28 00:20:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:20:00,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 00:20:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:01,185 INFO L225 Difference]: With dead ends: 202274 [2020-10-28 00:20:01,185 INFO L226 Difference]: Without dead ends: 131463 [2020-10-28 00:20:01,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:20:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131463 states. [2020-10-28 00:20:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131463 to 127038. [2020-10-28 00:20:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127038 states. [2020-10-28 00:20:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127038 states to 127038 states and 179874 transitions. [2020-10-28 00:20:10,470 INFO L78 Accepts]: Start accepts. Automaton has 127038 states and 179874 transitions. Word has length 99 [2020-10-28 00:20:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:10,470 INFO L481 AbstractCegarLoop]: Abstraction has 127038 states and 179874 transitions. [2020-10-28 00:20:10,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:20:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 127038 states and 179874 transitions. [2020-10-28 00:20:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:20:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:10,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:10,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:20:10,494 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1403111750, now seen corresponding path program 1 times [2020-10-28 00:20:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610601516] [2020-10-28 00:20:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:11,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:13,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:20:13,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:13,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2958 [2020-10-28 00:20:13,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:20:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:20:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:13,788 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:13,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:13,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:13,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:13,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610601516] [2020-10-28 00:20:13,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:20:13,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:20:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857669028] [2020-10-28 00:20:13,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:20:13,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:20:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:20:13,815 INFO L87 Difference]: Start difference. First operand 127038 states and 179874 transitions. Second operand 6 states. [2020-10-28 00:20:16,340 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:20:17,348 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:20:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:32,496 INFO L93 Difference]: Finished difference Result 351580 states and 494862 transitions. [2020-10-28 00:20:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:20:32,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-28 00:20:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:33,084 INFO L225 Difference]: With dead ends: 351580 [2020-10-28 00:20:33,085 INFO L226 Difference]: Without dead ends: 224080 [2020-10-28 00:20:33,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:20:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224080 states. [2020-10-28 00:20:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224080 to 131955. [2020-10-28 00:20:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131955 states. [2020-10-28 00:20:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131955 states to 131955 states and 185299 transitions. [2020-10-28 00:20:44,503 INFO L78 Accepts]: Start accepts. Automaton has 131955 states and 185299 transitions. Word has length 99 [2020-10-28 00:20:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:44,503 INFO L481 AbstractCegarLoop]: Abstraction has 131955 states and 185299 transitions. [2020-10-28 00:20:44,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 131955 states and 185299 transitions. [2020-10-28 00:20:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 00:20:44,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:44,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:44,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:20:44,528 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1515489987, now seen corresponding path program 1 times [2020-10-28 00:20:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:44,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816786093] [2020-10-28 00:20:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:44,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:44,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2447 [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:20:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:47,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:20:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:47,336 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:47,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:47,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:47,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:47,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:47,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816786093] [2020-10-28 00:20:47,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:20:47,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:20:47,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838890939] [2020-10-28 00:20:47,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:20:47,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:20:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:20:47,366 INFO L87 Difference]: Start difference. First operand 131955 states and 185299 transitions. Second operand 6 states. [2020-10-28 00:20:50,687 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:20:51,835 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 176