/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:09:34,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:09:34,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:09:34,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:09:34,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:09:34,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:09:34,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:09:34,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:09:34,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:09:34,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:09:34,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:09:34,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:09:34,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:09:34,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:09:34,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:09:34,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:09:34,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:09:34,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:09:34,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:09:34,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:09:34,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:09:34,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:09:34,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:09:34,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:09:34,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:09:34,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:09:34,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:09:34,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:09:34,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:09:34,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:09:34,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:09:34,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:09:34,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:09:34,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:09:34,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:09:34,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:09:34,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:09:34,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:09:34,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:09:34,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:09:34,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:09:34,441 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 [2020-10-29 14:09:34,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:09:34,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:09:34,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:09:34,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:09:34,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:09:34,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:09:34,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:09:34,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:09:34,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:09:34,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:09:34,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:09:34,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:09:34,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:09:34,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:09:34,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:09:34,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:09:34,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:09:34,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:09:34,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:09:34,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:09:34,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:09:34,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:09:34,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:09:34,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:09:34,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:09:34,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:09:34,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:09:34,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:09:34,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:09:34,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:09:34,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:09:34,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:09:34,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:09:34,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:09:34,913 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:09:34,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 14:09:34,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c91a76c90/d97a8e32673349639a9fe3c8dd1ef3fc/FLAG0dbf383df [2020-10-29 14:09:35,949 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:09:35,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 14:09:35,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c91a76c90/d97a8e32673349639a9fe3c8dd1ef3fc/FLAG0dbf383df [2020-10-29 14:09:36,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c91a76c90/d97a8e32673349639a9fe3c8dd1ef3fc [2020-10-29 14:09:36,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:09:36,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:09:36,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:36,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:09:36,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:09:36,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:36" (1/1) ... [2020-10-29 14:09:36,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577a3277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:36, skipping insertion in model container [2020-10-29 14:09:36,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:36" (1/1) ... [2020-10-29 14:09:36,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:09:36,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:09:37,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:37,737 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:09:38,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:38,724 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:09:38,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38 WrapperNode [2020-10-29 14:09:38,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:38,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:09:38,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:09:38,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:09:38,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:38,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (1/1) ... [2020-10-29 14:09:39,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:09:39,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:09:39,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:09:39,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:09:39,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (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 [2020-10-29 14:09:39,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:09:39,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:09:39,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:09:39,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:09:39,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:09:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:09:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:09:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:09:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:09:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:09:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:09:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:09:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:09:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:09:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:09:39,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:09:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:09:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:09:42,990 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:09:42,994 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:09:42,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:09:42 BoogieIcfgContainer [2020-10-29 14:09:42,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:09:43,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:09:43,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:09:43,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:09:43,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:09:36" (1/3) ... [2020-10-29 14:09:43,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644daec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:09:43, skipping insertion in model container [2020-10-29 14:09:43,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:38" (2/3) ... [2020-10-29 14:09:43,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644daec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:09:43, skipping insertion in model container [2020-10-29 14:09:43,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:09:42" (3/3) ... [2020-10-29 14:09:43,007 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 14:09:43,020 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:09:43,026 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:09:43,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:09:43,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:09:43,075 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:09:43,075 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:09:43,075 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:09:43,075 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:09:43,075 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:09:43,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:09:43,075 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:09:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states. [2020-10-29 14:09:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 14:09:43,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:43,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:09:43,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash -522103350, now seen corresponding path program 1 times [2020-10-29 14:09:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:43,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550093657] [2020-10-29 14:09:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:46,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:47,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:47,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:48,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:48,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 14:09:48,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:09:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-29 14:09:48,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:48,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:48,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:09:48,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-29 14:09:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-29 14:09:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 14:09:50,379 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:09:50,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:50,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:50,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:50,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:50,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 14:09:50,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:50,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:09:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:09:50,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550093657] [2020-10-29 14:09:50,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:50,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:09:50,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222812795] [2020-10-29 14:09:50,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:09:50,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:09:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:09:50,767 INFO L87 Difference]: Start difference. First operand 996 states. Second operand 4 states. [2020-10-29 14:09:51,749 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 14:09:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:59,864 INFO L93 Difference]: Finished difference Result 1728 states and 3078 transitions. [2020-10-29 14:09:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:09:59,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-29 14:09:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:59,918 INFO L225 Difference]: With dead ends: 1728 [2020-10-29 14:09:59,919 INFO L226 Difference]: Without dead ends: 1425 [2020-10-29 14:09:59,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2020-10-29 14:10:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1422. [2020-10-29 14:10:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1422 states. [2020-10-29 14:10:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 2205 transitions. [2020-10-29 14:10:00,073 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 2205 transitions. Word has length 319 [2020-10-29 14:10:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:00,075 INFO L481 AbstractCegarLoop]: Abstraction has 1422 states and 2205 transitions. [2020-10-29 14:10:00,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 2205 transitions. [2020-10-29 14:10:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 14:10:00,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:00,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:00,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:10:00,087 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1893745954, now seen corresponding path program 1 times [2020-10-29 14:10:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:00,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912660506] [2020-10-29 14:10:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:00,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:01,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:03,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:05,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:05,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 14:10:05,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:10:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:10:05,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:05,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 14:10:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-29 14:10:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:06,388 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:10:06,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:06,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:06,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:06,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 14:10:06,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:06,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912660506] [2020-10-29 14:10:06,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:06,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:06,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434151422] [2020-10-29 14:10:06,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:06,743 INFO L87 Difference]: Start difference. First operand 1422 states and 2205 transitions. Second operand 4 states. [2020-10-29 14:10:07,675 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 14:10:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:14,544 INFO L93 Difference]: Finished difference Result 2751 states and 4309 transitions. [2020-10-29 14:10:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:14,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-29 14:10:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:14,559 INFO L225 Difference]: With dead ends: 2751 [2020-10-29 14:10:14,559 INFO L226 Difference]: Without dead ends: 2399 [2020-10-29 14:10:14,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-10-29 14:10:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2396. [2020-10-29 14:10:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-29 14:10:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3731 transitions. [2020-10-29 14:10:14,658 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3731 transitions. Word has length 319 [2020-10-29 14:10:14,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:14,659 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3731 transitions. [2020-10-29 14:10:14,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3731 transitions. [2020-10-29 14:10:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 14:10:14,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:14,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:14,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:10:14,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1904243019, now seen corresponding path program 1 times [2020-10-29 14:10:14,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:14,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593510698] [2020-10-29 14:10:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:19,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:19,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 14:10:19,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:10:19,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 14:10:19,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:19,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-29 14:10:19,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:20,947 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:10:20,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:20,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:20,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:20,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:20,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:20,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:21,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593510698] [2020-10-29 14:10:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:21,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:21,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542617501] [2020-10-29 14:10:21,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:21,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:21,247 INFO L87 Difference]: Start difference. First operand 2396 states and 3731 transitions. Second operand 5 states. [2020-10-29 14:10:29,626 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 14:10:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:32,137 INFO L93 Difference]: Finished difference Result 7078 states and 11012 transitions. [2020-10-29 14:10:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:10:32,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-29 14:10:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:32,164 INFO L225 Difference]: With dead ends: 7078 [2020-10-29 14:10:32,164 INFO L226 Difference]: Without dead ends: 4695 [2020-10-29 14:10:32,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:10:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2020-10-29 14:10:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4556. [2020-10-29 14:10:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4556 states. [2020-10-29 14:10:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7063 transitions. [2020-10-29 14:10:32,369 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7063 transitions. Word has length 319 [2020-10-29 14:10:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:32,370 INFO L481 AbstractCegarLoop]: Abstraction has 4556 states and 7063 transitions. [2020-10-29 14:10:32,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:10:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7063 transitions. [2020-10-29 14:10:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-29 14:10:32,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:32,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:32,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:10:32,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash -128682680, now seen corresponding path program 1 times [2020-10-29 14:10:32,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:32,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124180419] [2020-10-29 14:10:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:32,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:32,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:37,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-29 14:10:37,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:10:37,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 14:10:37,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:37,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 14:10:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 14:10:37,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:38,475 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:10:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:38,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:38,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:38,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:38,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:38,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:10:38,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:38,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:38,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:38,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 14:10:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124180419] [2020-10-29 14:10:38,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:38,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:38,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389885049] [2020-10-29 14:10:38,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:38,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:38,765 INFO L87 Difference]: Start difference. First operand 4556 states and 7063 transitions. Second operand 4 states. [2020-10-29 14:10:48,415 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 14:10:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:50,721 INFO L93 Difference]: Finished difference Result 13338 states and 20624 transitions. [2020-10-29 14:10:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:50,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-29 14:10:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:50,766 INFO L225 Difference]: With dead ends: 13338 [2020-10-29 14:10:50,767 INFO L226 Difference]: Without dead ends: 8922 [2020-10-29 14:10:50,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8922 states. [2020-10-29 14:10:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8922 to 8787. [2020-10-29 14:10:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8787 states. [2020-10-29 14:10:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8787 states to 8787 states and 13551 transitions. [2020-10-29 14:10:51,155 INFO L78 Accepts]: Start accepts. Automaton has 8787 states and 13551 transitions. Word has length 321 [2020-10-29 14:10:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:51,155 INFO L481 AbstractCegarLoop]: Abstraction has 8787 states and 13551 transitions. [2020-10-29 14:10:51,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 8787 states and 13551 transitions. [2020-10-29 14:10:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-29 14:10:51,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:51,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:51,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:10:51,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1656756893, now seen corresponding path program 1 times [2020-10-29 14:10:51,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:51,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852888864] [2020-10-29 14:10:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:56,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:56,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-29 14:10:56,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:10:56,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 14:10:56,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:56,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 14:10:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:57,295 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:10:57,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:57,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:57,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:57,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852888864] [2020-10-29 14:10:57,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:57,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636808414] [2020-10-29 14:10:57,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:57,529 INFO L87 Difference]: Start difference. First operand 8787 states and 13551 transitions. Second operand 5 states. [2020-10-29 14:11:06,604 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 14:11:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:09,354 INFO L93 Difference]: Finished difference Result 25714 states and 39532 transitions. [2020-10-29 14:11:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:09,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-29 14:11:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:09,416 INFO L225 Difference]: With dead ends: 25714 [2020-10-29 14:11:09,417 INFO L226 Difference]: Without dead ends: 17157 [2020-10-29 14:11:09,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17157 states. [2020-10-29 14:11:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17157 to 16996. [2020-10-29 14:11:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16996 states. [2020-10-29 14:11:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16996 states to 16996 states and 26044 transitions. [2020-10-29 14:11:10,323 INFO L78 Accepts]: Start accepts. Automaton has 16996 states and 26044 transitions. Word has length 321 [2020-10-29 14:11:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:10,323 INFO L481 AbstractCegarLoop]: Abstraction has 16996 states and 26044 transitions. [2020-10-29 14:11:10,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16996 states and 26044 transitions. [2020-10-29 14:11:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-29 14:11:10,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:10,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:10,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:11:10,356 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1584348472, now seen corresponding path program 1 times [2020-10-29 14:11:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:10,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364318023] [2020-10-29 14:11:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:10,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:11,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:12,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:15,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:15,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 14:11:15,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 14:11:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:16,382 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:11:16,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:16,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:16,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:16,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:16,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364318023] [2020-10-29 14:11:16,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:16,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:11:16,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845424996] [2020-10-29 14:11:16,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:11:16,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:11:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:11:16,538 INFO L87 Difference]: Start difference. First operand 16996 states and 26044 transitions. Second operand 4 states. [2020-10-29 14:11:26,677 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 14:11:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:29,375 INFO L93 Difference]: Finished difference Result 49794 states and 76072 transitions. [2020-10-29 14:11:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:11:29,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-29 14:11:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:29,450 INFO L225 Difference]: With dead ends: 49794 [2020-10-29 14:11:29,450 INFO L226 Difference]: Without dead ends: 33141 [2020-10-29 14:11:29,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33141 states. [2020-10-29 14:11:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33141 to 32980. [2020-10-29 14:11:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32980 states. [2020-10-29 14:11:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32980 states to 32980 states and 50172 transitions. [2020-10-29 14:11:31,029 INFO L78 Accepts]: Start accepts. Automaton has 32980 states and 50172 transitions. Word has length 323 [2020-10-29 14:11:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:31,029 INFO L481 AbstractCegarLoop]: Abstraction has 32980 states and 50172 transitions. [2020-10-29 14:11:31,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:11:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 32980 states and 50172 transitions. [2020-10-29 14:11:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-29 14:11:31,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:31,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:31,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:11:31,094 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1427684509, now seen corresponding path program 1 times [2020-10-29 14:11:31,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:31,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910843141] [2020-10-29 14:11:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:31,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:32,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:33,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:36,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 14:11:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:37,135 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:11:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:37,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910843141] [2020-10-29 14:11:37,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:37,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047267295] [2020-10-29 14:11:37,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:37,278 INFO L87 Difference]: Start difference. First operand 32980 states and 50172 transitions. Second operand 5 states. [2020-10-29 14:11:47,014 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 14:11:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:50,164 INFO L93 Difference]: Finished difference Result 97409 states and 147912 transitions. [2020-10-29 14:11:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:50,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-29 14:11:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:50,299 INFO L225 Difference]: With dead ends: 97409 [2020-10-29 14:11:50,299 INFO L226 Difference]: Without dead ends: 64511 [2020-10-29 14:11:50,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64511 states. [2020-10-29 14:11:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64511 to 64426. [2020-10-29 14:11:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64426 states. [2020-10-29 14:11:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64426 states to 64426 states and 97186 transitions. [2020-10-29 14:11:53,477 INFO L78 Accepts]: Start accepts. Automaton has 64426 states and 97186 transitions. Word has length 323 [2020-10-29 14:11:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:53,477 INFO L481 AbstractCegarLoop]: Abstraction has 64426 states and 97186 transitions. [2020-10-29 14:11:53,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 64426 states and 97186 transitions. [2020-10-29 14:11:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:11:53,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:53,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:53,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:11:53,563 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -210438590, now seen corresponding path program 1 times [2020-10-29 14:11:53,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:53,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548636057] [2020-10-29 14:11:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:53,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:53,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:53,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:58,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:58,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 14:11:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-29 14:11:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:59,537 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:11:59,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:59,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:59,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:59,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548636057] [2020-10-29 14:11:59,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:59,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:11:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569642497] [2020-10-29 14:11:59,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:11:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:11:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:11:59,694 INFO L87 Difference]: Start difference. First operand 64426 states and 97186 transitions. Second operand 4 states. [2020-10-29 14:12:12,410 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 14:12:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:16,440 INFO L93 Difference]: Finished difference Result 189287 states and 284747 transitions. [2020-10-29 14:12:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:12:16,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:12:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:16,708 INFO L225 Difference]: With dead ends: 189287 [2020-10-29 14:12:16,708 INFO L226 Difference]: Without dead ends: 125658 [2020-10-29 14:12:16,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125658 states. [2020-10-29 14:12:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125658 to 125549. [2020-10-29 14:12:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125549 states. [2020-10-29 14:12:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125549 states to 125549 states and 187719 transitions. [2020-10-29 14:12:22,246 INFO L78 Accepts]: Start accepts. Automaton has 125549 states and 187719 transitions. Word has length 325 [2020-10-29 14:12:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:12:22,246 INFO L481 AbstractCegarLoop]: Abstraction has 125549 states and 187719 transitions. [2020-10-29 14:12:22,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:12:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 125549 states and 187719 transitions. [2020-10-29 14:12:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:12:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:12:22,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:12:22,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:12:22,367 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:12:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:12:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1230067357, now seen corresponding path program 1 times [2020-10-29 14:12:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:12:22,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582873197] [2020-10-29 14:12:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:12:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:22,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:22,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:23,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:23,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:26,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:26,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:27,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:12:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:12:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-29 14:12:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:28,796 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:12:28,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:12:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:28,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:28,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:12:28,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:12:28,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:12:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582873197] [2020-10-29 14:12:28,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:12:28,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:12:28,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636247930] [2020-10-29 14:12:28,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:12:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:12:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:12:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:28,983 INFO L87 Difference]: Start difference. First operand 125549 states and 187719 transitions. Second operand 5 states. [2020-10-29 14:12:45,596 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 14:12:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:52,354 INFO L93 Difference]: Finished difference Result 370447 states and 552730 transitions. [2020-10-29 14:12:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:12:52,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-29 14:12:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:52,871 INFO L225 Difference]: With dead ends: 370447 [2020-10-29 14:12:52,871 INFO L226 Difference]: Without dead ends: 245854 [2020-10-29 14:12:52,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:12:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245854 states. [2020-10-29 14:13:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245854 to 245521. [2020-10-29 14:13:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245521 states. [2020-10-29 14:13:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245521 states to 245521 states and 364318 transitions. [2020-10-29 14:13:06,385 INFO L78 Accepts]: Start accepts. Automaton has 245521 states and 364318 transitions. Word has length 325 [2020-10-29 14:13:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:13:06,385 INFO L481 AbstractCegarLoop]: Abstraction has 245521 states and 364318 transitions. [2020-10-29 14:13:06,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:13:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 245521 states and 364318 transitions. [2020-10-29 14:13:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-29 14:13:06,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:13:06,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:13:06,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:13:06,938 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:13:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:13:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -844812346, now seen corresponding path program 1 times [2020-10-29 14:13:06,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:13:06,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645419496] [2020-10-29 14:13:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:13:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:13:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:07,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking...