/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.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:14:18,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:14:18,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:14:18,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:14:18,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:14:18,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:14:18,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:14:18,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:14:18,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:14:19,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:14:19,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:14:19,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:14:19,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:14:19,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:14:19,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:14:19,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:14:19,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:14:19,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:14:19,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:14:19,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:14:19,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:14:19,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:14:19,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:14:19,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:14:19,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:14:19,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:14:19,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:14:19,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:14:19,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:14:19,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:14:19,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:14:19,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:14:19,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:14:19,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:14:19,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:14:19,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:14:19,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:14:19,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:14:19,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:14:19,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:14:19,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:14:19,054 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 14:14:19,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:14:19,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:14:19,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:14:19,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:14:19,086 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:14:19,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:14:19,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:14:19,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:14:19,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:14:19,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:14:19,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:14:19,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:14:19,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:14:19,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:14:19,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:14:19,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:14:19,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:14:19,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:14:19,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:14:19,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:14:19,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:14:19,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:14:19,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:14:19,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:14:19,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:14:19,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:14:19,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:14:19,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:14:19,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:14:19,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:14:19,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:14:19,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:14:19,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:14:19,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:14:19,620 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:14:19,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 14:14:19,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c0ca108d/f570bdf7f997425eaf6963f13cf55f37/FLAGd600ec63f [2020-10-29 14:14:20,744 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:14:20,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 14:14:20,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c0ca108d/f570bdf7f997425eaf6963f13cf55f37/FLAGd600ec63f [2020-10-29 14:14:21,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c0ca108d/f570bdf7f997425eaf6963f13cf55f37 [2020-10-29 14:14:21,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:14:21,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:14:21,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:14:21,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:14:21,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:14:21,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:14:21" (1/1) ... [2020-10-29 14:14:21,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc1a026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:21, skipping insertion in model container [2020-10-29 14:14:21,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:14:21" (1/1) ... [2020-10-29 14:14:21,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:14:21,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:14:22,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:14:22,797 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:14:23,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:14:23,477 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:14:23,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23 WrapperNode [2020-10-29 14:14:23,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:14:23,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:14:23,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:14:23,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:14:23,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (1/1) ... [2020-10-29 14:14:23,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:14:23,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:14:23,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:14:23,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:14:23,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (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 14:14:23,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:14:23,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:14:23,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:14:23,809 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:14:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:14:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:14:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:14:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:14:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:14:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:14:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:14:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:14:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:14:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:14:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:14:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:14:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:14:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:14:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:14:29,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:14:29,962 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:14:29,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:14:29 BoogieIcfgContainer [2020-10-29 14:14:29,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:14:29,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:14:29,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:14:29,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:14:29,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:14:21" (1/3) ... [2020-10-29 14:14:29,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e402b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:14:29, skipping insertion in model container [2020-10-29 14:14:29,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:14:23" (2/3) ... [2020-10-29 14:14:29,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e402b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:14:29, skipping insertion in model container [2020-10-29 14:14:29,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:14:29" (3/3) ... [2020-10-29 14:14:29,976 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-29 14:14:29,989 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:14:29,996 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:14:30,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:14:30,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:14:30,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:14:30,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:14:30,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:14:30,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:14:30,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:14:30,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:14:30,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:14:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states. [2020-10-29 14:14:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-29 14:14:30,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:14:30,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:30,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:14:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:14:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1115878415, now seen corresponding path program 1 times [2020-10-29 14:14:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:14:30,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136590019] [2020-10-29 14:14:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:14:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:14:30,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:31,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:31,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:32,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:33,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:33,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:14:35,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-29 14:14:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 14:14:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-29 14:14:35,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:14:35,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:14:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:14:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:14:35,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-29 14:14:35,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 14:14:38,748 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:14:38,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:14:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:14:38,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:14:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:14:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:14:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:14:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-29 14:14:38,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:14:38,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:14:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:14:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:14:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:14:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:14:39,438 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 14:14:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136590019] [2020-10-29 14:14:39,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:14:39,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:14:39,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165455674] [2020-10-29 14:14:39,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:14:39,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:14:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:14:39,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:14:39,470 INFO L87 Difference]: Start difference. First operand 1553 states. Second operand 5 states. [2020-10-29 14:14:57,751 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-29 14:14:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:14:59,867 INFO L93 Difference]: Finished difference Result 4502 states and 7990 transitions. [2020-10-29 14:14:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:14:59,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2020-10-29 14:14:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:14:59,907 INFO L225 Difference]: With dead ends: 4502 [2020-10-29 14:14:59,907 INFO L226 Difference]: Without dead ends: 3014 [2020-10-29 14:14:59,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:14:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-29 14:15:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3011. [2020-10-29 14:15:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-29 14:15:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 5051 transitions. [2020-10-29 14:15:00,221 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 5051 transitions. Word has length 392 [2020-10-29 14:15:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:15:00,223 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 5051 transitions. [2020-10-29 14:15:00,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:15:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 5051 transitions. [2020-10-29 14:15:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-29 14:15:00,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:15:00,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:00,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:15:00,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:15:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:15:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1513978730, now seen corresponding path program 1 times [2020-10-29 14:15:00,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:15:00,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368961475] [2020-10-29 14:15:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:15:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:15:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:02,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:03,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:05,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:15:05,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-29 14:15:05,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:15:05,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-29 14:15:05,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:15:05,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:15:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:15:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:15:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-29 14:15:05,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:15:08,016 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:15:08,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:15:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:15:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:08,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:15:08,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:15:08,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:15:08,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 14:15:08,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:15:08,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:15:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:15:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:15:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:15:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:15:08,483 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 14:15:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368961475] [2020-10-29 14:15:08,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:15:08,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:15:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893385705] [2020-10-29 14:15:08,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:15:08,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:15:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:15:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:15:08,487 INFO L87 Difference]: Start difference. First operand 3011 states and 5051 transitions. Second operand 5 states. [2020-10-29 14:15:26,376 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-29 14:15:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:15:28,385 INFO L93 Difference]: Finished difference Result 8840 states and 14813 transitions. [2020-10-29 14:15:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:15:28,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 392 [2020-10-29 14:15:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:15:28,421 INFO L225 Difference]: With dead ends: 8840 [2020-10-29 14:15:28,422 INFO L226 Difference]: Without dead ends: 5927 [2020-10-29 14:15:28,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:15:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2020-10-29 14:15:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5924. [2020-10-29 14:15:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5924 states. [2020-10-29 14:15:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 9893 transitions. [2020-10-29 14:15:28,803 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 9893 transitions. Word has length 392 [2020-10-29 14:15:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:15:28,804 INFO L481 AbstractCegarLoop]: Abstraction has 5924 states and 9893 transitions. [2020-10-29 14:15:28,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:15:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 9893 transitions. [2020-10-29 14:15:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-10-29 14:15:28,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:15:28,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:28,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:15:28,826 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:15:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:15:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1230972776, now seen corresponding path program 1 times [2020-10-29 14:15:28,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:15:28,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901174389] [2020-10-29 14:15:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:15:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:15:29,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:29,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:29,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:30,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:32,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:32,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:34,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:15:34,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-29 14:15:34,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:15:34,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-29 14:15:34,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:15:34,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:15:34,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:15:34,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 14:15:34,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-29 14:15:34,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:15:36,417 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:15:36,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:15:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:15:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:15:36,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:15:36,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:15:36,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:15:36,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 14:15:36,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:15:36,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:15:36,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:15:36,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:15:36,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:15:36,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:15:36,860 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 14:15:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901174389] [2020-10-29 14:15:36,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:15:36,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:15:36,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155069451] [2020-10-29 14:15:36,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:15:36,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:15:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:15:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:15:36,865 INFO L87 Difference]: Start difference. First operand 5924 states and 9893 transitions. Second operand 4 states. [2020-10-29 14:16:00,708 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 429 [2020-10-29 14:16:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:16:02,872 INFO L93 Difference]: Finished difference Result 17272 states and 28792 transitions. [2020-10-29 14:16:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:16:02,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 394 [2020-10-29 14:16:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:16:02,938 INFO L225 Difference]: With dead ends: 17272 [2020-10-29 14:16:02,939 INFO L226 Difference]: Without dead ends: 11645 [2020-10-29 14:16:02,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:16:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2020-10-29 14:16:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 11642. [2020-10-29 14:16:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11642 states. [2020-10-29 14:16:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11642 states to 11642 states and 19362 transitions. [2020-10-29 14:16:03,721 INFO L78 Accepts]: Start accepts. Automaton has 11642 states and 19362 transitions. Word has length 394 [2020-10-29 14:16:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:16:03,721 INFO L481 AbstractCegarLoop]: Abstraction has 11642 states and 19362 transitions. [2020-10-29 14:16:03,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:16:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 11642 states and 19362 transitions. [2020-10-29 14:16:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-10-29 14:16:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:16:03,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:03,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:16:03,759 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:16:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:16:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1583585852, now seen corresponding path program 1 times [2020-10-29 14:16:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:16:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589082110] [2020-10-29 14:16:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:16:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:16:03,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:05,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:06,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:06,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:08,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:08,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:16:08,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-29 14:16:08,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:16:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 14:16:08,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:16:08,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:16:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:16:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:16:08,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-29 14:16:08,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 14:16:11,494 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:16:11,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:16:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:16:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:16:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:16:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:16:11,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:16:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:16:11,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:16:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:16:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:16:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:16:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:16:11,861 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 14:16:11,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589082110] [2020-10-29 14:16:11,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:16:11,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:16:11,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270290958] [2020-10-29 14:16:11,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:16:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:16:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:16:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:16:11,864 INFO L87 Difference]: Start difference. First operand 11642 states and 19362 transitions. Second operand 5 states. [2020-10-29 14:16:30,191 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-29 14:16:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:16:32,571 INFO L93 Difference]: Finished difference Result 34625 states and 57580 transitions. [2020-10-29 14:16:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:16:32,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 394 [2020-10-29 14:16:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:16:32,639 INFO L225 Difference]: With dead ends: 34625 [2020-10-29 14:16:32,640 INFO L226 Difference]: Without dead ends: 23012 [2020-10-29 14:16:32,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:16:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23012 states. [2020-10-29 14:16:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23012 to 23009. [2020-10-29 14:16:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23009 states. [2020-10-29 14:16:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23009 states to 23009 states and 38112 transitions. [2020-10-29 14:16:34,371 INFO L78 Accepts]: Start accepts. Automaton has 23009 states and 38112 transitions. Word has length 394 [2020-10-29 14:16:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:16:34,372 INFO L481 AbstractCegarLoop]: Abstraction has 23009 states and 38112 transitions. [2020-10-29 14:16:34,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:16:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23009 states and 38112 transitions. [2020-10-29 14:16:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-29 14:16:34,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:16:34,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:34,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:16:34,436 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:16:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:16:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1653635122, now seen corresponding path program 1 times [2020-10-29 14:16:34,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:16:34,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246316739] [2020-10-29 14:16:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:16:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:16:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:34,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:34,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:36,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:39,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 14:16:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-29 14:16:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:16:41,955 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:16:41,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:16:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:16:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:16:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:16:42,221 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 14:16:42,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246316739] [2020-10-29 14:16:42,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:16:42,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:16:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345520301] [2020-10-29 14:16:42,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:16:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:16:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:16:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:16:42,224 INFO L87 Difference]: Start difference. First operand 23009 states and 38112 transitions. Second operand 4 states. [2020-10-29 14:17:12,882 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 429 [2020-10-29 14:17:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:17:16,429 INFO L93 Difference]: Finished difference Result 67399 states and 111476 transitions. [2020-10-29 14:17:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:17:16,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 395 [2020-10-29 14:17:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:17:16,543 INFO L225 Difference]: With dead ends: 67399 [2020-10-29 14:17:16,544 INFO L226 Difference]: Without dead ends: 45180 [2020-10-29 14:17:16,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:17:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45180 states. [2020-10-29 14:17:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45180 to 45177. [2020-10-29 14:17:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45177 states. [2020-10-29 14:17:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45177 states to 45177 states and 74498 transitions. [2020-10-29 14:17:19,076 INFO L78 Accepts]: Start accepts. Automaton has 45177 states and 74498 transitions. Word has length 395 [2020-10-29 14:17:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:17:19,077 INFO L481 AbstractCegarLoop]: Abstraction has 45177 states and 74498 transitions. [2020-10-29 14:17:19,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:17:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 45177 states and 74498 transitions. [2020-10-29 14:17:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-29 14:17:19,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:17:19,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:19,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:17:19,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:17:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:17:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2016893385, now seen corresponding path program 1 times [2020-10-29 14:17:19,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:17:19,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634503405] [2020-10-29 14:17:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:17:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:17:19,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:19,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:22,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:22,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:24,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:17:24,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-29 14:17:24,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 14:17:24,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-29 14:17:24,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:17:24,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:17:24,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:17:24,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:17:24,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-29 14:17:24,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:17:26,967 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-29 14:17:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:17:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:17:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:26,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:17:26,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:17:26,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:17:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:17:26,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:17:26,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:17:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:17:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:17:26,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:17:26,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:17:27,240 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 14:17:27,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634503405] [2020-10-29 14:17:27,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:17:27,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:17:27,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257673492] [2020-10-29 14:17:27,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:17:27,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:17:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:17:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:17:27,243 INFO L87 Difference]: Start difference. First operand 45177 states and 74498 transitions. Second operand 5 states. [2020-10-29 14:17:48,172 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-29 14:17:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:17:50,701 INFO L93 Difference]: Finished difference Result 131903 states and 217082 transitions. [2020-10-29 14:17:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:17:50,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 395 [2020-10-29 14:17:50,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:17:50,970 INFO L225 Difference]: With dead ends: 131903 [2020-10-29 14:17:50,970 INFO L226 Difference]: Without dead ends: 88400 [2020-10-29 14:17:51,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:17:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88400 states. [2020-10-29 14:17:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88400 to 88397. [2020-10-29 14:17:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88397 states. [2020-10-29 14:17:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88397 states to 88397 states and 144940 transitions. [2020-10-29 14:17:56,239 INFO L78 Accepts]: Start accepts. Automaton has 88397 states and 144940 transitions. Word has length 395 [2020-10-29 14:17:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:17:56,240 INFO L481 AbstractCegarLoop]: Abstraction has 88397 states and 144940 transitions. [2020-10-29 14:17:56,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:17:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 88397 states and 144940 transitions. [2020-10-29 14:17:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-29 14:17:56,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:17:56,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:56,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:17:56,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:17:56,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:17:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1520591888, now seen corresponding path program 1 times [2020-10-29 14:17:56,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:17:56,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335967515] [2020-10-29 14:17:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:17:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:17:56,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:56,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:57,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:17:57,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking...