/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_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:54:46,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:54:46,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:54:46,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:54:46,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:54:46,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:54:46,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:54:46,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:54:46,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:54:46,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:54:46,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:54:46,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:54:46,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:54:46,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:54:46,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:54:46,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:54:46,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:54:46,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:54:46,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:54:46,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:54:46,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:54:46,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:54:46,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:54:46,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:54:46,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:54:46,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:54:46,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:54:46,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:54:46,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:54:46,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:54:46,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:54:46,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:54:46,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:54:46,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:54:46,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:54:46,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:54:46,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:54:46,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:54:46,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:54:46,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:54:46,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:54:46,562 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 12:54:46,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:54:46,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:54:46,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:54:46,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:54:46,590 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:54:46,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:54:46,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:54:46,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:54:46,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:54:46,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:54:46,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:54:46,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:54:46,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:54:46,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:54:46,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:54:46,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:54:46,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:54:46,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:54:46,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:54:46,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:54:46,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:54:46,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:54:46,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:54:46,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:54:46,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:54:46,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:54:46,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:54:46,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:54:46,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:54:46,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:54:46,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:54:47,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:54:47,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:54:47,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:54:47,019 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:54:47,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 12:54:47,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0a3737a5/a03de76963ec4505b4b1d775a0e52b02/FLAG5580acebf [2020-10-29 12:54:47,793 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:54:47,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 12:54:47,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0a3737a5/a03de76963ec4505b4b1d775a0e52b02/FLAG5580acebf [2020-10-29 12:54:48,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0a3737a5/a03de76963ec4505b4b1d775a0e52b02 [2020-10-29 12:54:48,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:54:48,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:54:48,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:54:48,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:54:48,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:54:48,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c058000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48, skipping insertion in model container [2020-10-29 12:54:48,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:54:48,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:54:48,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:54:48,621 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:54:48,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:54:48,806 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:54:48,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48 WrapperNode [2020-10-29 12:54:48,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:54:48,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:54:48,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:54:48,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:54:48,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (1/1) ... [2020-10-29 12:54:48,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:54:48,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:54:48,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:54:48,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:54:48,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (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 12:54:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:54:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:54:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:54:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 12:54:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:54:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:54:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:54:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:54:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:54:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 12:54:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 12:54:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 12:54:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 12:54:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 12:54:48,997 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 12:54:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 12:54:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 12:54:48,998 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 12:54:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 12:54:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 12:54:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:54:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:54:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:54:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:54:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:54:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:54:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:54:50,258 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:54:50,259 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 12:54:50,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:54:50 BoogieIcfgContainer [2020-10-29 12:54:50,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:54:50,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:54:50,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:54:50,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:54:50,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:54:48" (1/3) ... [2020-10-29 12:54:50,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed27f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:54:50, skipping insertion in model container [2020-10-29 12:54:50,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:54:48" (2/3) ... [2020-10-29 12:54:50,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed27f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:54:50, skipping insertion in model container [2020-10-29 12:54:50,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:54:50" (3/3) ... [2020-10-29 12:54:50,271 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 12:54:50,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:54:50,291 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:54:50,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:54:50,337 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:54:50,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:54:50,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:54:50,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:54:50,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:54:50,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:54:50,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:54:50,338 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:54:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-10-29 12:54:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 12:54:50,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:54:50,373 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] [2020-10-29 12:54:50,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:54:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:54:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1717592954, now seen corresponding path program 1 times [2020-10-29 12:54:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:54:50,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643114372] [2020-10-29 12:54:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:54:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:54:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:51,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:51,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:53,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:54:53,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 12:54:53,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 12:54:53,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2555 [2020-10-29 12:54:53,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:54:53,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:54:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:54:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 12:54:53,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 12:54:53,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 12:54:54,181 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:54:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:54:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:54:54,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:54,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:54:54,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:54:54,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:54:54,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 12:54:54,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:54:54,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:54:54,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:54:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:54:54,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:54:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 12:54:54,289 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 12:54:54,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643114372] [2020-10-29 12:54:54,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:54:54,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 12:54:54,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718745275] [2020-10-29 12:54:54,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 12:54:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:54:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 12:54:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 12:54:54,323 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 4 states. [2020-10-29 12:54:54,971 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 12:54:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:54:56,527 INFO L93 Difference]: Finished difference Result 301 states and 506 transitions. [2020-10-29 12:54:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:54:56,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-29 12:54:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:54:56,552 INFO L225 Difference]: With dead ends: 301 [2020-10-29 12:54:56,552 INFO L226 Difference]: Without dead ends: 207 [2020-10-29 12:54:56,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:54:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-29 12:54:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2020-10-29 12:54:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-29 12:54:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 318 transitions. [2020-10-29 12:54:56,682 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 318 transitions. Word has length 62 [2020-10-29 12:54:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:54:56,684 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 318 transitions. [2020-10-29 12:54:56,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 12:54:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 318 transitions. [2020-10-29 12:54:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 12:54:56,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:54:56,698 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] [2020-10-29 12:54:56,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:54:56,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:54:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:54:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1229530538, now seen corresponding path program 1 times [2020-10-29 12:54:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:54:56,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327362672] [2020-10-29 12:54:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:54:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:54:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:56,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:56,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:54:58,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:01,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:01,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:55:01,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:55:01,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 12:55:01,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:01,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:01,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 12:55:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 12:55:02,558 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:02,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:02,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:02,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:02,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:02,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 12:55:02,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:02,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:02,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:55:02,628 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 12:55:02,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327362672] [2020-10-29 12:55:02,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:02,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:02,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719610260] [2020-10-29 12:55:02,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:02,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:02,634 INFO L87 Difference]: Start difference. First operand 204 states and 318 transitions. Second operand 5 states. [2020-10-29 12:55:04,218 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:04,398 INFO L93 Difference]: Finished difference Result 560 states and 872 transitions. [2020-10-29 12:55:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:04,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-29 12:55:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:04,403 INFO L225 Difference]: With dead ends: 560 [2020-10-29 12:55:04,403 INFO L226 Difference]: Without dead ends: 381 [2020-10-29 12:55:04,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-29 12:55:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 378. [2020-10-29 12:55:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-29 12:55:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 588 transitions. [2020-10-29 12:55:04,455 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 588 transitions. Word has length 64 [2020-10-29 12:55:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:04,456 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 588 transitions. [2020-10-29 12:55:04,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 588 transitions. [2020-10-29 12:55:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 12:55:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:04,458 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] [2020-10-29 12:55:04,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:55:04,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 815670445, now seen corresponding path program 1 times [2020-10-29 12:55:04,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:04,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486235231] [2020-10-29 12:55:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:05,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:08,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:55:08,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:55:08,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4244 [2020-10-29 12:55:08,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:08,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 12:55:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:55:09,391 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:09,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:09,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:09,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:09,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 12:55:09,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:09,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:09,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:55:09,483 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 12:55:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486235231] [2020-10-29 12:55:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:09,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:09,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646944306] [2020-10-29 12:55:09,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:09,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:09,487 INFO L87 Difference]: Start difference. First operand 378 states and 588 transitions. Second operand 5 states. [2020-10-29 12:55:11,454 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:11,590 INFO L93 Difference]: Finished difference Result 1064 states and 1653 transitions. [2020-10-29 12:55:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:11,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-29 12:55:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:11,598 INFO L225 Difference]: With dead ends: 1064 [2020-10-29 12:55:11,598 INFO L226 Difference]: Without dead ends: 726 [2020-10-29 12:55:11,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-10-29 12:55:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2020-10-29 12:55:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-10-29 12:55:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1118 transitions. [2020-10-29 12:55:11,719 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1118 transitions. Word has length 64 [2020-10-29 12:55:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:11,722 INFO L481 AbstractCegarLoop]: Abstraction has 723 states and 1118 transitions. [2020-10-29 12:55:11,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1118 transitions. [2020-10-29 12:55:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 12:55:11,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:11,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:11,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:55:11,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1844128868, now seen corresponding path program 1 times [2020-10-29 12:55:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:11,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764196238] [2020-10-29 12:55:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:11,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:12,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:12,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:15,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:15,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 12:55:15,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3569 [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 12:55:15,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:16,022 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:16,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:16,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:16,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 12:55:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:16,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:55:16,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764196238] [2020-10-29 12:55:16,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:16,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408813354] [2020-10-29 12:55:16,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:16,089 INFO L87 Difference]: Start difference. First operand 723 states and 1118 transitions. Second operand 5 states. [2020-10-29 12:55:17,777 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:17,907 INFO L93 Difference]: Finished difference Result 2005 states and 3126 transitions. [2020-10-29 12:55:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:17,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-29 12:55:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:17,916 INFO L225 Difference]: With dead ends: 2005 [2020-10-29 12:55:17,917 INFO L226 Difference]: Without dead ends: 1394 [2020-10-29 12:55:17,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2020-10-29 12:55:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1391. [2020-10-29 12:55:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2020-10-29 12:55:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2135 transitions. [2020-10-29 12:55:18,065 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2135 transitions. Word has length 65 [2020-10-29 12:55:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:18,066 INFO L481 AbstractCegarLoop]: Abstraction has 1391 states and 2135 transitions. [2020-10-29 12:55:18,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2135 transitions. [2020-10-29 12:55:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 12:55:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:18,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:18,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 12:55:18,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash 411651847, now seen corresponding path program 1 times [2020-10-29 12:55:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:18,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826296673] [2020-10-29 12:55:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 12:55:23,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 12:55:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 12:55:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:23,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 12:55:23,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:23,743 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:23,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:23,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:23,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:23,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:23,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 12:55:23,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:23,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:23,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:23,793 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 12:55:23,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826296673] [2020-10-29 12:55:23,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:23,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429218312] [2020-10-29 12:55:23,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:23,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:23,795 INFO L87 Difference]: Start difference. First operand 1391 states and 2135 transitions. Second operand 5 states. [2020-10-29 12:55:25,554 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:25,760 INFO L93 Difference]: Finished difference Result 3685 states and 5761 transitions. [2020-10-29 12:55:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:25,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-29 12:55:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:25,778 INFO L225 Difference]: With dead ends: 3685 [2020-10-29 12:55:25,778 INFO L226 Difference]: Without dead ends: 2654 [2020-10-29 12:55:25,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2020-10-29 12:55:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2651. [2020-10-29 12:55:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2651 states. [2020-10-29 12:55:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4041 transitions. [2020-10-29 12:55:26,138 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4041 transitions. Word has length 65 [2020-10-29 12:55:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:26,139 INFO L481 AbstractCegarLoop]: Abstraction has 2651 states and 4041 transitions. [2020-10-29 12:55:26,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4041 transitions. [2020-10-29 12:55:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 12:55:26,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:26,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:26,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 12:55:26,146 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 123600718, now seen corresponding path program 1 times [2020-10-29 12:55:26,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:26,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188557885] [2020-10-29 12:55:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:26,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:26,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:26,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:31,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:31,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 12:55:31,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:55:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4841 [2020-10-29 12:55:31,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:31,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:55:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 12:55:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 12:55:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:31,786 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:31,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:31,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 12:55:31,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:31,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:31,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:31,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:55:31,825 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 12:55:31,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188557885] [2020-10-29 12:55:31,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:31,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 12:55:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401131729] [2020-10-29 12:55:31,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 12:55:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 12:55:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 12:55:31,829 INFO L87 Difference]: Start difference. First operand 2651 states and 4041 transitions. Second operand 4 states. [2020-10-29 12:55:32,390 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 12:55:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:33,837 INFO L93 Difference]: Finished difference Result 6417 states and 10173 transitions. [2020-10-29 12:55:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:55:33,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-29 12:55:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:33,865 INFO L225 Difference]: With dead ends: 6417 [2020-10-29 12:55:33,865 INFO L226 Difference]: Without dead ends: 4430 [2020-10-29 12:55:33,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2020-10-29 12:55:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 4427. [2020-10-29 12:55:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4427 states. [2020-10-29 12:55:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6889 transitions. [2020-10-29 12:55:34,487 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6889 transitions. Word has length 66 [2020-10-29 12:55:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:34,489 INFO L481 AbstractCegarLoop]: Abstraction has 4427 states and 6889 transitions. [2020-10-29 12:55:34,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 12:55:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6889 transitions. [2020-10-29 12:55:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 12:55:34,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:34,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:34,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 12:55:34,496 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1486457082, now seen corresponding path program 1 times [2020-10-29 12:55:34,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:34,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116949356] [2020-10-29 12:55:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:39,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:39,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 12:55:39,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 12:55:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 12:55:39,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:39,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:39,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 12:55:39,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:40,127 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:40,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:40,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:40,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:40,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:40,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 12:55:40,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:40,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:40,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:40,177 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 12:55:40,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116949356] [2020-10-29 12:55:40,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:40,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:40,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090688517] [2020-10-29 12:55:40,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:40,182 INFO L87 Difference]: Start difference. First operand 4427 states and 6889 transitions. Second operand 5 states. [2020-10-29 12:55:42,284 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:42,726 INFO L93 Difference]: Finished difference Result 12723 states and 19776 transitions. [2020-10-29 12:55:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:42,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 12:55:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:42,770 INFO L225 Difference]: With dead ends: 12723 [2020-10-29 12:55:42,771 INFO L226 Difference]: Without dead ends: 8456 [2020-10-29 12:55:42,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8456 states. [2020-10-29 12:55:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8456 to 8453. [2020-10-29 12:55:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8453 states. [2020-10-29 12:55:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8453 states to 8453 states and 13024 transitions. [2020-10-29 12:55:43,862 INFO L78 Accepts]: Start accepts. Automaton has 8453 states and 13024 transitions. Word has length 68 [2020-10-29 12:55:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:43,863 INFO L481 AbstractCegarLoop]: Abstraction has 8453 states and 13024 transitions. [2020-10-29 12:55:43,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8453 states and 13024 transitions. [2020-10-29 12:55:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 12:55:43,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:43,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:43,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 12:55:43,878 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1474875918, now seen corresponding path program 1 times [2020-10-29 12:55:43,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:43,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941827469] [2020-10-29 12:55:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:43,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:43,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:44,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:44,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:48,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:48,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:55:48,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:55:48,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 12:55:48,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:49,583 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:55:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:55:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:49,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:49,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:49,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:55:49,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:55:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 12:55:49,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:49,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:55:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:55:49,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:55:49,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:55:49,629 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 12:55:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941827469] [2020-10-29 12:55:49,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:55:49,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:55:49,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179754898] [2020-10-29 12:55:49,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:55:49,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:55:49,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:55:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:55:49,632 INFO L87 Difference]: Start difference. First operand 8453 states and 13024 transitions. Second operand 5 states. [2020-10-29 12:55:52,136 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:55:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:55:53,069 INFO L93 Difference]: Finished difference Result 23377 states and 36480 transitions. [2020-10-29 12:55:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:55:53,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 12:55:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:55:53,136 INFO L225 Difference]: With dead ends: 23377 [2020-10-29 12:55:53,136 INFO L226 Difference]: Without dead ends: 16142 [2020-10-29 12:55:53,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:55:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16142 states. [2020-10-29 12:55:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16142 to 16139. [2020-10-29 12:55:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16139 states. [2020-10-29 12:55:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 24572 transitions. [2020-10-29 12:55:54,992 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 24572 transitions. Word has length 68 [2020-10-29 12:55:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:55:54,992 INFO L481 AbstractCegarLoop]: Abstraction has 16139 states and 24572 transitions. [2020-10-29 12:55:54,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:55:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 24572 transitions. [2020-10-29 12:55:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 12:55:55,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:55:55,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:55:55,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 12:55:55,019 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:55:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:55:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 346829138, now seen corresponding path program 1 times [2020-10-29 12:55:55,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:55:55,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703847072] [2020-10-29 12:55:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:55:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:55:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:55,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:55,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:56,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:55:59,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:55:59,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4398 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 12:55:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:00,026 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:56:00,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:56:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:00,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:00,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:56:00,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:56:00,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:56:00,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:00,066 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 12:56:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703847072] [2020-10-29 12:56:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:56:00,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 12:56:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710333131] [2020-10-29 12:56:00,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 12:56:00,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:56:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 12:56:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 12:56:00,069 INFO L87 Difference]: Start difference. First operand 16139 states and 24572 transitions. Second operand 4 states. [2020-10-29 12:56:00,773 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 12:56:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:56:04,282 INFO L93 Difference]: Finished difference Result 42257 states and 66048 transitions. [2020-10-29 12:56:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:56:04,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 12:56:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:56:04,375 INFO L225 Difference]: With dead ends: 42257 [2020-10-29 12:56:04,375 INFO L226 Difference]: Without dead ends: 28430 [2020-10-29 12:56:04,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:56:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28430 states. [2020-10-29 12:56:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28430 to 28427. [2020-10-29 12:56:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28427 states. [2020-10-29 12:56:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28427 states to 28427 states and 43772 transitions. [2020-10-29 12:56:07,385 INFO L78 Accepts]: Start accepts. Automaton has 28427 states and 43772 transitions. Word has length 69 [2020-10-29 12:56:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:56:07,385 INFO L481 AbstractCegarLoop]: Abstraction has 28427 states and 43772 transitions. [2020-10-29 12:56:07,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 12:56:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28427 states and 43772 transitions. [2020-10-29 12:56:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 12:56:07,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:56:07,407 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] [2020-10-29 12:56:07,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 12:56:07,408 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:56:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:56:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 953961540, now seen corresponding path program 1 times [2020-10-29 12:56:07,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:56:07,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055289193] [2020-10-29 12:56:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:56:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:07,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:07,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:08,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:09,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:12,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:56:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 12:56:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 12:56:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:13,080 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:56:13,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:56:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:13,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:13,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:56:13,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:56:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 12:56:13,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:13,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:56:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:56:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:56:13,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:13,115 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 12:56:13,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055289193] [2020-10-29 12:56:13,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:56:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:56:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179742778] [2020-10-29 12:56:13,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:56:13,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:56:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:56:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:56:13,118 INFO L87 Difference]: Start difference. First operand 28427 states and 43772 transitions. Second operand 5 states. [2020-10-29 12:56:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:56:15,836 INFO L93 Difference]: Finished difference Result 46783 states and 71796 transitions. [2020-10-29 12:56:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:56:15,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 12:56:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:56:15,884 INFO L225 Difference]: With dead ends: 46783 [2020-10-29 12:56:15,884 INFO L226 Difference]: Without dead ends: 18516 [2020-10-29 12:56:15,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:56:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18516 states. [2020-10-29 12:56:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18516 to 18513. [2020-10-29 12:56:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18513 states. [2020-10-29 12:56:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18513 states to 18513 states and 28260 transitions. [2020-10-29 12:56:18,440 INFO L78 Accepts]: Start accepts. Automaton has 18513 states and 28260 transitions. Word has length 72 [2020-10-29 12:56:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:56:18,441 INFO L481 AbstractCegarLoop]: Abstraction has 18513 states and 28260 transitions. [2020-10-29 12:56:18,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:56:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 18513 states and 28260 transitions. [2020-10-29 12:56:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 12:56:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:56:18,455 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] [2020-10-29 12:56:18,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 12:56:18,455 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:56:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:56:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 304060116, now seen corresponding path program 1 times [2020-10-29 12:56:18,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:56:18,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022086002] [2020-10-29 12:56:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:56:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:18,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:19,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:23,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:23,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 12:56:23,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 12:56:23,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:24,233 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:56:24,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:56:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:24,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:24,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:24,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:56:24,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:56:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 12:56:24,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:24,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:56:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:56:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:56:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:24,270 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 12:56:24,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022086002] [2020-10-29 12:56:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:56:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:56:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827419327] [2020-10-29 12:56:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:56:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:56:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:56:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:56:24,273 INFO L87 Difference]: Start difference. First operand 18513 states and 28260 transitions. Second operand 5 states. [2020-10-29 12:56:24,922 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 12:56:27,230 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 12:56:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:56:29,467 INFO L93 Difference]: Finished difference Result 36426 states and 57050 transitions. [2020-10-29 12:56:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 12:56:29,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 12:56:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:56:29,528 INFO L225 Difference]: With dead ends: 36426 [2020-10-29 12:56:29,529 INFO L226 Difference]: Without dead ends: 27231 [2020-10-29 12:56:29,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:56:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27231 states. [2020-10-29 12:56:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27231 to 27225. [2020-10-29 12:56:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27225 states. [2020-10-29 12:56:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27225 states to 27225 states and 41212 transitions. [2020-10-29 12:56:32,525 INFO L78 Accepts]: Start accepts. Automaton has 27225 states and 41212 transitions. Word has length 72 [2020-10-29 12:56:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:56:32,526 INFO L481 AbstractCegarLoop]: Abstraction has 27225 states and 41212 transitions. [2020-10-29 12:56:32,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:56:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 27225 states and 41212 transitions. [2020-10-29 12:56:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 12:56:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:56:32,536 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] [2020-10-29 12:56:32,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 12:56:32,536 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:56:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:56:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1587592778, now seen corresponding path program 1 times [2020-10-29 12:56:32,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:56:32,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485160889] [2020-10-29 12:56:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:56:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:32,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:33,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:33,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:37,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:37,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 12:56:37,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:56:37,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-29 12:56:37,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:37,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:37,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:56:37,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:56:37,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 12:56:37,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:38,290 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:56:38,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:56:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:38,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:38,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:56:38,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:56:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:56:38,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:38,325 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 12:56:38,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485160889] [2020-10-29 12:56:38,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:56:38,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:56:38,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010757748] [2020-10-29 12:56:38,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:56:38,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:56:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:56:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:56:38,327 INFO L87 Difference]: Start difference. First operand 27225 states and 41212 transitions. Second operand 5 states. [2020-10-29 12:56:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:56:41,309 INFO L93 Difference]: Finished difference Result 45552 states and 68759 transitions. [2020-10-29 12:56:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:56:41,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 12:56:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:56:41,331 INFO L225 Difference]: With dead ends: 45552 [2020-10-29 12:56:41,331 INFO L226 Difference]: Without dead ends: 18369 [2020-10-29 12:56:41,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:56:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18369 states. [2020-10-29 12:56:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18369 to 18368. [2020-10-29 12:56:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18368 states. [2020-10-29 12:56:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18368 states to 18368 states and 27605 transitions. [2020-10-29 12:56:43,329 INFO L78 Accepts]: Start accepts. Automaton has 18368 states and 27605 transitions. Word has length 72 [2020-10-29 12:56:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:56:43,330 INFO L481 AbstractCegarLoop]: Abstraction has 18368 states and 27605 transitions. [2020-10-29 12:56:43,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:56:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 18368 states and 27605 transitions. [2020-10-29 12:56:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 12:56:43,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:56:43,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:56:43,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 12:56:43,337 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:56:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:56:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash -968014905, now seen corresponding path program 1 times [2020-10-29 12:56:43,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:56:43,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693075596] [2020-10-29 12:56:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:56:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:43,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:48,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:56:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 12:56:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 12:56:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:48,985 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:56:48,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:56:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:48,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:56:48,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:56:49,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:56:49,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:56:49,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:56:49,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:56:49,013 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 12:56:49,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693075596] [2020-10-29 12:56:49,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:56:49,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 12:56:49,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079751426] [2020-10-29 12:56:49,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 12:56:49,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:56:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 12:56:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 12:56:49,015 INFO L87 Difference]: Start difference. First operand 18368 states and 27605 transitions. Second operand 4 states. [2020-10-29 12:56:49,757 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 12:56:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:56:53,709 INFO L93 Difference]: Finished difference Result 41822 states and 63809 transitions. [2020-10-29 12:56:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:56:53,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-29 12:56:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:56:53,750 INFO L225 Difference]: With dead ends: 41822 [2020-10-29 12:56:53,750 INFO L226 Difference]: Without dead ends: 30207 [2020-10-29 12:56:53,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:56:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30207 states. [2020-10-29 12:56:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30207 to 30204. [2020-10-29 12:56:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30204 states. [2020-10-29 12:56:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30204 states to 30204 states and 45753 transitions. [2020-10-29 12:56:57,082 INFO L78 Accepts]: Start accepts. Automaton has 30204 states and 45753 transitions. Word has length 73 [2020-10-29 12:56:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:56:57,083 INFO L481 AbstractCegarLoop]: Abstraction has 30204 states and 45753 transitions. [2020-10-29 12:56:57,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 12:56:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 30204 states and 45753 transitions. [2020-10-29 12:56:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 12:56:57,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:56:57,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:56:57,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 12:56:57,092 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:56:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:56:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1805102176, now seen corresponding path program 1 times [2020-10-29 12:56:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:56:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862803558] [2020-10-29 12:56:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:56:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:56:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:57,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:57,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:56:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:01,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:02,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 12:57:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:02,772 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:57:02,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:57:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:02,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:02,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:57:02,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:57:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:57:02,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:02,804 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 12:57:02,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862803558] [2020-10-29 12:57:02,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:57:02,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:57:02,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977666818] [2020-10-29 12:57:02,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:57:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:57:02,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:57:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:57:02,806 INFO L87 Difference]: Start difference. First operand 30204 states and 45753 transitions. Second operand 5 states. [2020-10-29 12:57:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:57:06,459 INFO L93 Difference]: Finished difference Result 54853 states and 83013 transitions. [2020-10-29 12:57:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:57:06,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 12:57:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:57:06,497 INFO L225 Difference]: With dead ends: 54853 [2020-10-29 12:57:06,497 INFO L226 Difference]: Without dead ends: 24817 [2020-10-29 12:57:06,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:57:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24817 states. [2020-10-29 12:57:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24817 to 24817. [2020-10-29 12:57:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24817 states. [2020-10-29 12:57:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24817 states to 24817 states and 37457 transitions. [2020-10-29 12:57:09,486 INFO L78 Accepts]: Start accepts. Automaton has 24817 states and 37457 transitions. Word has length 73 [2020-10-29 12:57:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:57:09,486 INFO L481 AbstractCegarLoop]: Abstraction has 24817 states and 37457 transitions. [2020-10-29 12:57:09,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:57:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24817 states and 37457 transitions. [2020-10-29 12:57:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 12:57:09,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:57:09,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:57:09,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 12:57:09,494 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:57:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:57:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1489025093, now seen corresponding path program 1 times [2020-10-29 12:57:09,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:57:09,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142954937] [2020-10-29 12:57:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:57:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:09,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:09,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:09,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:09,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:14,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:14,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:57:14,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 12:57:14,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 12:57:14,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:15,187 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:57:15,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:57:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:15,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:57:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:57:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 12:57:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:15,247 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 12:57:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142954937] [2020-10-29 12:57:15,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:57:15,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 12:57:15,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109357978] [2020-10-29 12:57:15,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 12:57:15,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:57:15,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 12:57:15,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 12:57:15,249 INFO L87 Difference]: Start difference. First operand 24817 states and 37457 transitions. Second operand 8 states. [2020-10-29 12:57:15,926 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:57:18,105 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-29 12:57:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:57:22,604 INFO L93 Difference]: Finished difference Result 63332 states and 95680 transitions. [2020-10-29 12:57:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 12:57:22,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-29 12:57:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:57:22,663 INFO L225 Difference]: With dead ends: 63332 [2020-10-29 12:57:22,663 INFO L226 Difference]: Without dead ends: 39295 [2020-10-29 12:57:22,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-29 12:57:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39295 states. [2020-10-29 12:57:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39295 to 25462. [2020-10-29 12:57:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25462 states. [2020-10-29 12:57:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25462 states to 25462 states and 37733 transitions. [2020-10-29 12:57:26,094 INFO L78 Accepts]: Start accepts. Automaton has 25462 states and 37733 transitions. Word has length 73 [2020-10-29 12:57:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:57:26,095 INFO L481 AbstractCegarLoop]: Abstraction has 25462 states and 37733 transitions. [2020-10-29 12:57:26,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 12:57:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25462 states and 37733 transitions. [2020-10-29 12:57:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 12:57:26,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:57:26,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:57:26,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 12:57:26,102 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:57:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:57:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1213235518, now seen corresponding path program 1 times [2020-10-29 12:57:26,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:57:26,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488727721] [2020-10-29 12:57:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:57:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:26,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:26,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:29,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:29,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 12:57:29,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3759 [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 12:57:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 12:57:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:30,531 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:57:30,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:57:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:30,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:57:30,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:57:30,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:57:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:57:30,557 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 12:57:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488727721] [2020-10-29 12:57:30,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:57:30,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:57:30,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415545556] [2020-10-29 12:57:30,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:57:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:57:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:57:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:57:30,559 INFO L87 Difference]: Start difference. First operand 25462 states and 37733 transitions. Second operand 6 states. [2020-10-29 12:57:31,285 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-29 12:57:33,699 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 12:57:34,559 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 12:57:35,246 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 12:57:35,960 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 12:57:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:57:45,674 INFO L93 Difference]: Finished difference Result 108202 states and 160695 transitions. [2020-10-29 12:57:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 12:57:45,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 12:57:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:57:45,820 INFO L225 Difference]: With dead ends: 108202 [2020-10-29 12:57:45,820 INFO L226 Difference]: Without dead ends: 84165 [2020-10-29 12:57:45,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 12:57:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84165 states. [2020-10-29 12:57:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84165 to 71544. [2020-10-29 12:57:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71544 states. [2020-10-29 12:57:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71544 states to 71544 states and 105101 transitions. [2020-10-29 12:57:55,347 INFO L78 Accepts]: Start accepts. Automaton has 71544 states and 105101 transitions. Word has length 73 [2020-10-29 12:57:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:57:55,348 INFO L481 AbstractCegarLoop]: Abstraction has 71544 states and 105101 transitions. [2020-10-29 12:57:55,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:57:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 71544 states and 105101 transitions. [2020-10-29 12:57:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 12:57:55,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:57:55,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:57:55,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 12:57:55,522 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:57:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:57:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -344389722, now seen corresponding path program 1 times [2020-10-29 12:57:55,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:57:55,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288048189] [2020-10-29 12:57:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:57:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:57:55,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:57:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:58:00,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 12:58:00,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:58:01,241 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 12:58:01,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:58:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:58:01,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:58:01,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:58:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 12:58:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:58:01,302 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 12:58:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288048189] [2020-10-29 12:58:01,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:58:01,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 12:58:01,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678347907] [2020-10-29 12:58:01,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 12:58:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:58:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 12:58:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 12:58:01,305 INFO L87 Difference]: Start difference. First operand 71544 states and 105101 transitions. Second operand 8 states. [2020-10-29 12:58:02,010 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 12:58:04,663 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-29 12:58:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:58:19,016 INFO L93 Difference]: Finished difference Result 174441 states and 255448 transitions. [2020-10-29 12:58:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 12:58:19,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-29 12:58:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:58:19,348 INFO L225 Difference]: With dead ends: 174441 [2020-10-29 12:58:19,348 INFO L226 Difference]: Without dead ends: 103969 [2020-10-29 12:58:19,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 12:58:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103969 states.