/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:14:00,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:14:00,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:14:00,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:14:00,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:14:00,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:14:00,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:14:00,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:14:00,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:14:00,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:14:00,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:14:00,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:14:00,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:14:00,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:14:00,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:14:00,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:14:00,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:14:00,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:14:00,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:14:00,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:14:00,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:14:00,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:14:00,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:14:00,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:14:00,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:14:00,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:14:00,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:14:00,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:14:00,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:14:00,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:14:00,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:14:00,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:14:00,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:14:00,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:14:00,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:14:00,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:14:00,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:14:00,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:14:00,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:14:00,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:14:00,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:14:00,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:14:00,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:14:00,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:14:00,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:14:00,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:14:00,677 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:14:00,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:14:00,678 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:14:00,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:14:00,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:14:00,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:14:00,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:14:00,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:14:00,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:14:00,680 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:14:00,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:14:00,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:14:00,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:14:00,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:14:00,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:14:00,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:14:00,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:14:00,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:14:00,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:14:00,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:14:00,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:14:00,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:14:00,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:14:00,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:14:00,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:14:00,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:14:01,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:14:01,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:14:01,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:14:01,170 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:14:01,171 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:14:01,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:14:01,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe360343/eca0f00c60fd4e06b8540495fe1114df/FLAGa671a6565 [2020-10-28 18:14:02,057 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:14:02,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:14:02,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe360343/eca0f00c60fd4e06b8540495fe1114df/FLAGa671a6565 [2020-10-28 18:14:02,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efe360343/eca0f00c60fd4e06b8540495fe1114df [2020-10-28 18:14:02,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:14:02,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:14:02,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:14:02,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:14:02,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:14:02,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:14:02" (1/1) ... [2020-10-28 18:14:02,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689b59bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:02, skipping insertion in model container [2020-10-28 18:14:02,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:14:02" (1/1) ... [2020-10-28 18:14:02,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:14:02,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:14:02,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:14:02,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:14:03,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:14:03,100 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:14:03,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03 WrapperNode [2020-10-28 18:14:03,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:14:03,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:14:03,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:14:03,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:14:03,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... [2020-10-28 18:14:03,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:14:03,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:14:03,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:14:03,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:14:03,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:14:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:14:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:14:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:14:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:14:03,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:14:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:14:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:14:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:14:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:14:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:14:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:14:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:14:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:14:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:14:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:14:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:14:03,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:14:04,994 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:14:04,995 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:14:04,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:14:04 BoogieIcfgContainer [2020-10-28 18:14:04,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:14:05,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:14:05,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:14:05,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:14:05,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:14:02" (1/3) ... [2020-10-28 18:14:05,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cf0ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:14:05, skipping insertion in model container [2020-10-28 18:14:05,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:14:03" (2/3) ... [2020-10-28 18:14:05,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cf0ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:14:05, skipping insertion in model container [2020-10-28 18:14:05,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:14:04" (3/3) ... [2020-10-28 18:14:05,011 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:14:05,025 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:14:05,032 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:14:05,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:14:05,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:14:05,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:14:05,086 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:14:05,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:14:05,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:14:05,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:14:05,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:14:05,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:14:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states. [2020-10-28 18:14:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 18:14:05,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:05,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:05,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 255437413, now seen corresponding path program 1 times [2020-10-28 18:14:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:05,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099798025] [2020-10-28 18:14:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:05,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:06,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:07,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:08,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:10,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:10,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 18:14:10,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:14:10,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 18:14:10,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:10,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:14:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:14:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:14:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:14:11,398 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:11,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:11,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:11,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:11,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:14:11,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:11,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:11,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099798025] [2020-10-28 18:14:11,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:11,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:14:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065505423] [2020-10-28 18:14:11,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:14:11,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:14:11,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:14:11,551 INFO L87 Difference]: Start difference. First operand 314 states. Second operand 4 states. [2020-10-28 18:14:11,963 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:14:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:14,048 INFO L93 Difference]: Finished difference Result 611 states and 1066 transitions. [2020-10-28 18:14:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:14:14,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-10-28 18:14:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:14,073 INFO L225 Difference]: With dead ends: 611 [2020-10-28 18:14:14,073 INFO L226 Difference]: Without dead ends: 495 [2020-10-28 18:14:14,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-28 18:14:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 492. [2020-10-28 18:14:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-28 18:14:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 731 transitions. [2020-10-28 18:14:14,209 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 731 transitions. Word has length 149 [2020-10-28 18:14:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:14,213 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 731 transitions. [2020-10-28 18:14:14,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:14:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 731 transitions. [2020-10-28 18:14:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 18:14:14,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:14,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:14,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:14:14,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1397685933, now seen corresponding path program 1 times [2020-10-28 18:14:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:14,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037950107] [2020-10-28 18:14:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:19,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:19,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 18:14:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:14:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:14:19,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:19,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:14:19,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:14:19,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:14:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:14:19,702 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:19,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:19,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:19,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:19,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:19,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:14:19,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:19,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:19,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037950107] [2020-10-28 18:14:19,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:19,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:14:19,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549589140] [2020-10-28 18:14:19,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:14:19,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:19,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:14:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:14:19,827 INFO L87 Difference]: Start difference. First operand 492 states and 731 transitions. Second operand 4 states. [2020-10-28 18:14:20,279 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:14:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:21,695 INFO L93 Difference]: Finished difference Result 1036 states and 1584 transitions. [2020-10-28 18:14:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:14:21,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-10-28 18:14:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:21,705 INFO L225 Difference]: With dead ends: 1036 [2020-10-28 18:14:21,706 INFO L226 Difference]: Without dead ends: 853 [2020-10-28 18:14:21,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-10-28 18:14:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 850. [2020-10-28 18:14:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-28 18:14:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1275 transitions. [2020-10-28 18:14:21,808 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1275 transitions. Word has length 149 [2020-10-28 18:14:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:21,810 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 1275 transitions. [2020-10-28 18:14:21,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:14:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1275 transitions. [2020-10-28 18:14:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 18:14:21,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:21,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:21,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:14:21,815 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash 872619772, now seen corresponding path program 1 times [2020-10-28 18:14:21,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:21,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488129010] [2020-10-28 18:14:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:23,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:25,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:25,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:26,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:26,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 18:14:26,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:14:26,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:14:26,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:26,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:14:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 18:14:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:14:27,544 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:27,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:27,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:27,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:27,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:14:27,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:27,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:14:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:27,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488129010] [2020-10-28 18:14:27,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:27,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:27,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235266031] [2020-10-28 18:14:27,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:27,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:27,658 INFO L87 Difference]: Start difference. First operand 850 states and 1275 transitions. Second operand 5 states. [2020-10-28 18:14:30,007 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:14:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:30,969 INFO L93 Difference]: Finished difference Result 2464 states and 3688 transitions. [2020-10-28 18:14:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:14:30,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-10-28 18:14:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:30,980 INFO L225 Difference]: With dead ends: 2464 [2020-10-28 18:14:30,980 INFO L226 Difference]: Without dead ends: 1643 [2020-10-28 18:14:30,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-10-28 18:14:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1640. [2020-10-28 18:14:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-10-28 18:14:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2439 transitions. [2020-10-28 18:14:31,124 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2439 transitions. Word has length 149 [2020-10-28 18:14:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:31,124 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2439 transitions. [2020-10-28 18:14:31,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2439 transitions. [2020-10-28 18:14:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-28 18:14:31,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:31,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:31,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:14:31,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981, now seen corresponding path program 1 times [2020-10-28 18:14:31,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:31,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512117180] [2020-10-28 18:14:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:32,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:33,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:33,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:36,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 18:14:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:14:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:14:36,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:36,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:14:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:14:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:14:36,609 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:36,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:36,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:36,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:36,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:36,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:36,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:14:36,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:36,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:36,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512117180] [2020-10-28 18:14:36,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:36,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:36,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657770580] [2020-10-28 18:14:36,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:36,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:36,708 INFO L87 Difference]: Start difference. First operand 1640 states and 2439 transitions. Second operand 5 states. [2020-10-28 18:14:38,778 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:14:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:39,677 INFO L93 Difference]: Finished difference Result 4449 states and 6587 transitions. [2020-10-28 18:14:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:14:39,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-28 18:14:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:39,695 INFO L225 Difference]: With dead ends: 4449 [2020-10-28 18:14:39,695 INFO L226 Difference]: Without dead ends: 2849 [2020-10-28 18:14:39,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2020-10-28 18:14:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2846. [2020-10-28 18:14:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2846 states. [2020-10-28 18:14:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4171 transitions. [2020-10-28 18:14:39,903 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4171 transitions. Word has length 150 [2020-10-28 18:14:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:39,903 INFO L481 AbstractCegarLoop]: Abstraction has 2846 states and 4171 transitions. [2020-10-28 18:14:39,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4171 transitions. [2020-10-28 18:14:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 18:14:39,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:39,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:39,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:14:39,910 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1854936649, now seen corresponding path program 1 times [2020-10-28 18:14:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:39,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178826542] [2020-10-28 18:14:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:39,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:40,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:41,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:44,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:44,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 18:14:44,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:14:44,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:14:44,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:44,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:14:44,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:14:44,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:14:45,417 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:45,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:45,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:45,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:45,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:14:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:45,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:45,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:45,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:45,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178826542] [2020-10-28 18:14:45,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:45,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:45,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560921308] [2020-10-28 18:14:45,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:45,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:45,521 INFO L87 Difference]: Start difference. First operand 2846 states and 4171 transitions. Second operand 5 states. [2020-10-28 18:14:47,875 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:14:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:48,995 INFO L93 Difference]: Finished difference Result 8048 states and 11808 transitions. [2020-10-28 18:14:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:14:48,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-28 18:14:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:49,024 INFO L225 Difference]: With dead ends: 8048 [2020-10-28 18:14:49,024 INFO L226 Difference]: Without dead ends: 5492 [2020-10-28 18:14:49,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2020-10-28 18:14:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5489. [2020-10-28 18:14:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5489 states. [2020-10-28 18:14:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 7941 transitions. [2020-10-28 18:14:49,408 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 7941 transitions. Word has length 151 [2020-10-28 18:14:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:49,408 INFO L481 AbstractCegarLoop]: Abstraction has 5489 states and 7941 transitions. [2020-10-28 18:14:49,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 7941 transitions. [2020-10-28 18:14:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 18:14:49,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:49,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:49,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:14:49,419 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1211394681, now seen corresponding path program 1 times [2020-10-28 18:14:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:49,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041470758] [2020-10-28 18:14:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:49,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:49,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:49,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:50,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:50,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:54,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:54,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 18:14:54,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:54,866 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:14:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:54,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:54,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:54,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:54,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:54,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041470758] [2020-10-28 18:14:54,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:54,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:54,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166586895] [2020-10-28 18:14:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:54,958 INFO L87 Difference]: Start difference. First operand 5489 states and 7941 transitions. Second operand 5 states. [2020-10-28 18:14:57,218 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:14:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:58,314 INFO L93 Difference]: Finished difference Result 15843 states and 22863 transitions. [2020-10-28 18:14:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:14:58,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-28 18:14:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:58,363 INFO L225 Difference]: With dead ends: 15843 [2020-10-28 18:14:58,363 INFO L226 Difference]: Without dead ends: 10576 [2020-10-28 18:14:58,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10576 states. [2020-10-28 18:14:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10576 to 10573. [2020-10-28 18:14:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10573 states. [2020-10-28 18:14:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 15097 transitions. [2020-10-28 18:14:59,238 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 15097 transitions. Word has length 152 [2020-10-28 18:14:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:59,239 INFO L481 AbstractCegarLoop]: Abstraction has 10573 states and 15097 transitions. [2020-10-28 18:14:59,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 15097 transitions. [2020-10-28 18:14:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 18:14:59,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:59,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:59,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:14:59,257 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 958282936, now seen corresponding path program 1 times [2020-10-28 18:14:59,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:59,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614566751] [2020-10-28 18:14:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:59,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:59,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:59,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:59,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:00,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:04,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:04,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 18:15:04,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:15:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:15:04,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:04,746 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:15:04,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:04,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:04,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:04,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:15:04,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:04,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:04,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614566751] [2020-10-28 18:15:04,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:04,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:04,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244545334] [2020-10-28 18:15:04,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:04,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:04,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:04,833 INFO L87 Difference]: Start difference. First operand 10573 states and 15097 transitions. Second operand 5 states. [2020-10-28 18:15:07,295 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:15:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:08,601 INFO L93 Difference]: Finished difference Result 30755 states and 43800 transitions. [2020-10-28 18:15:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:15:08,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-28 18:15:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:08,660 INFO L225 Difference]: With dead ends: 30755 [2020-10-28 18:15:08,661 INFO L226 Difference]: Without dead ends: 20434 [2020-10-28 18:15:08,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:15:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20434 states. [2020-10-28 18:15:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20434 to 20431. [2020-10-28 18:15:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20431 states. [2020-10-28 18:15:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20431 states to 20431 states and 28779 transitions. [2020-10-28 18:15:09,977 INFO L78 Accepts]: Start accepts. Automaton has 20431 states and 28779 transitions. Word has length 153 [2020-10-28 18:15:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:09,977 INFO L481 AbstractCegarLoop]: Abstraction has 20431 states and 28779 transitions. [2020-10-28 18:15:09,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:15:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20431 states and 28779 transitions. [2020-10-28 18:15:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 18:15:10,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:10,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:10,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:15:10,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1057370809, now seen corresponding path program 1 times [2020-10-28 18:15:10,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:10,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934124831] [2020-10-28 18:15:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:10,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:15,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 18:15:15,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:15:15,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:15:15,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:15,464 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:15:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:15,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:15,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934124831] [2020-10-28 18:15:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336307464] [2020-10-28 18:15:15,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:15,536 INFO L87 Difference]: Start difference. First operand 20431 states and 28779 transitions. Second operand 5 states. [2020-10-28 18:15:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:17,943 INFO L93 Difference]: Finished difference Result 37760 states and 53208 transitions. [2020-10-28 18:15:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:15:17,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-28 18:15:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:17,978 INFO L225 Difference]: With dead ends: 37760 [2020-10-28 18:15:17,979 INFO L226 Difference]: Without dead ends: 17437 [2020-10-28 18:15:18,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:15:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2020-10-28 18:15:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2020-10-28 18:15:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17437 states. [2020-10-28 18:15:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 24580 transitions. [2020-10-28 18:15:19,108 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 24580 transitions. Word has length 154 [2020-10-28 18:15:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:19,108 INFO L481 AbstractCegarLoop]: Abstraction has 17437 states and 24580 transitions. [2020-10-28 18:15:19,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:15:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 24580 transitions. [2020-10-28 18:15:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 18:15:19,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:19,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:19,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:15:19,130 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash -473705355, now seen corresponding path program 1 times [2020-10-28 18:15:19,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:19,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166747139] [2020-10-28 18:15:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:24,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:24,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:15:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 18:15:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:24,744 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:15:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:24,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:24,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:24,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:24,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:15:24,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:24,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166747139] [2020-10-28 18:15:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599953495] [2020-10-28 18:15:24,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:15:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:15:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:15:24,887 INFO L87 Difference]: Start difference. First operand 17437 states and 24580 transitions. Second operand 6 states. [2020-10-28 18:15:25,332 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 18:15:28,035 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:15:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:29,358 INFO L93 Difference]: Finished difference Result 48771 states and 69292 transitions. [2020-10-28 18:15:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:15:29,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2020-10-28 18:15:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:29,416 INFO L225 Difference]: With dead ends: 48771 [2020-10-28 18:15:29,417 INFO L226 Difference]: Without dead ends: 33488 [2020-10-28 18:15:29,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:15:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33488 states. [2020-10-28 18:15:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33488 to 33485. [2020-10-28 18:15:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33485 states. [2020-10-28 18:15:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33485 states to 33485 states and 46760 transitions. [2020-10-28 18:15:31,493 INFO L78 Accepts]: Start accepts. Automaton has 33485 states and 46760 transitions. Word has length 161 [2020-10-28 18:15:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:31,493 INFO L481 AbstractCegarLoop]: Abstraction has 33485 states and 46760 transitions. [2020-10-28 18:15:31,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:15:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 33485 states and 46760 transitions. [2020-10-28 18:15:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 18:15:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:31,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:31,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:15:31,531 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash -557076792, now seen corresponding path program 1 times [2020-10-28 18:15:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:31,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640124033] [2020-10-28 18:15:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:31,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:15:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:15:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:15:36,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:37,139 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:15:37,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:37,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:37,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:37,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:37,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:37,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:15:37,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:37,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:37,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640124033] [2020-10-28 18:15:37,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:37,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:15:37,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110083110] [2020-10-28 18:15:37,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:15:37,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:15:37,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:15:37,210 INFO L87 Difference]: Start difference. First operand 33485 states and 46760 transitions. Second operand 4 states. [2020-10-28 18:15:37,597 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:15:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:41,822 INFO L93 Difference]: Finished difference Result 70451 states and 101864 transitions. [2020-10-28 18:15:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:15:41,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-28 18:15:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:41,914 INFO L225 Difference]: With dead ends: 70451 [2020-10-28 18:15:41,914 INFO L226 Difference]: Without dead ends: 52272 [2020-10-28 18:15:41,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52272 states. [2020-10-28 18:15:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52272 to 52221. [2020-10-28 18:15:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52221 states. [2020-10-28 18:15:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52221 states to 52221 states and 73332 transitions. [2020-10-28 18:15:45,609 INFO L78 Accepts]: Start accepts. Automaton has 52221 states and 73332 transitions. Word has length 161 [2020-10-28 18:15:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:45,609 INFO L481 AbstractCegarLoop]: Abstraction has 52221 states and 73332 transitions. [2020-10-28 18:15:45,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:15:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52221 states and 73332 transitions. [2020-10-28 18:15:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 18:15:45,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:45,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:45,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:15:45,646 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1571417205, now seen corresponding path program 1 times [2020-10-28 18:15:45,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:45,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690238791] [2020-10-28 18:15:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:45,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:45,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:50,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:50,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:50,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:50,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 18:15:50,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:15:50,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:15:50,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:50,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:15:50,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:51,246 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:15:51,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:51,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:51,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:51,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:51,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:51,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:15:51,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:51,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:51,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690238791] [2020-10-28 18:15:51,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:51,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977364250] [2020-10-28 18:15:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:51,311 INFO L87 Difference]: Start difference. First operand 52221 states and 73332 transitions. Second operand 5 states. [2020-10-28 18:15:55,926 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:15:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:59,752 INFO L93 Difference]: Finished difference Result 129014 states and 180948 transitions. [2020-10-28 18:15:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:15:59,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-28 18:15:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:59,889 INFO L225 Difference]: With dead ends: 129014 [2020-10-28 18:15:59,890 INFO L226 Difference]: Without dead ends: 77755 [2020-10-28 18:15:59,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77755 states. [2020-10-28 18:16:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77755 to 77752. [2020-10-28 18:16:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77752 states. [2020-10-28 18:16:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77752 states to 77752 states and 107377 transitions. [2020-10-28 18:16:06,261 INFO L78 Accepts]: Start accepts. Automaton has 77752 states and 107377 transitions. Word has length 161 [2020-10-28 18:16:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:06,262 INFO L481 AbstractCegarLoop]: Abstraction has 77752 states and 107377 transitions. [2020-10-28 18:16:06,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 77752 states and 107377 transitions. [2020-10-28 18:16:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 18:16:06,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:06,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:06,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:16:06,327 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash 893444883, now seen corresponding path program 1 times [2020-10-28 18:16:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739113292] [2020-10-28 18:16:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:16:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:16:11,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:11,851 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:16:11,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:11,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:11,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:16:11,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:11,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739113292] [2020-10-28 18:16:11,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:11,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008412666] [2020-10-28 18:16:11,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:11,937 INFO L87 Difference]: Start difference. First operand 77752 states and 107377 transitions. Second operand 5 states. [2020-10-28 18:16:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:18,088 INFO L93 Difference]: Finished difference Result 135404 states and 186965 transitions. [2020-10-28 18:16:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:16:18,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-28 18:16:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:18,174 INFO L225 Difference]: With dead ends: 135404 [2020-10-28 18:16:18,174 INFO L226 Difference]: Without dead ends: 57741 [2020-10-28 18:16:18,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:16:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57741 states. [2020-10-28 18:16:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57741 to 57739. [2020-10-28 18:16:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57739 states. [2020-10-28 18:16:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57739 states to 57739 states and 79703 transitions. [2020-10-28 18:16:22,876 INFO L78 Accepts]: Start accepts. Automaton has 57739 states and 79703 transitions. Word has length 162 [2020-10-28 18:16:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:22,876 INFO L481 AbstractCegarLoop]: Abstraction has 57739 states and 79703 transitions. [2020-10-28 18:16:22,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 57739 states and 79703 transitions. [2020-10-28 18:16:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:16:22,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:22,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:22,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:16:22,904 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1622809621, now seen corresponding path program 1 times [2020-10-28 18:16:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:22,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637972898] [2020-10-28 18:16:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:23,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:27,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:27,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 18:16:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:16:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:28,337 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:16:28,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:28,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:28,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:28,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:28,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:16:28,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:28,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637972898] [2020-10-28 18:16:28,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:28,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:28,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844686871] [2020-10-28 18:16:28,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:28,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:28,404 INFO L87 Difference]: Start difference. First operand 57739 states and 79703 transitions. Second operand 5 states. [2020-10-28 18:16:28,794 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 18:16:33,063 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:16:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:37,546 INFO L93 Difference]: Finished difference Result 120865 states and 171539 transitions. [2020-10-28 18:16:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:16:37,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-28 18:16:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:37,644 INFO L225 Difference]: With dead ends: 120865 [2020-10-28 18:16:37,645 INFO L226 Difference]: Without dead ends: 76612 [2020-10-28 18:16:37,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76612 states. [2020-10-28 18:16:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76612 to 76606. [2020-10-28 18:16:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76606 states. [2020-10-28 18:16:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76606 states to 76606 states and 107412 transitions. [2020-10-28 18:16:43,583 INFO L78 Accepts]: Start accepts. Automaton has 76606 states and 107412 transitions. Word has length 170 [2020-10-28 18:16:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:43,583 INFO L481 AbstractCegarLoop]: Abstraction has 76606 states and 107412 transitions. [2020-10-28 18:16:43,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 76606 states and 107412 transitions. [2020-10-28 18:16:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:16:43,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:43,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:43,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:16:43,619 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1658861827, now seen corresponding path program 1 times [2020-10-28 18:16:43,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:43,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086460303] [2020-10-28 18:16:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:43,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:48,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 18:16:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:16:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:49,059 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:16:49,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:49,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:49,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:49,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:49,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:16:49,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:49,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:49,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:49,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:49,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086460303] [2020-10-28 18:16:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:49,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921961356] [2020-10-28 18:16:49,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:49,121 INFO L87 Difference]: Start difference. First operand 76606 states and 107412 transitions. Second operand 5 states. [2020-10-28 18:16:49,522 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 18:16:56,174 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:17:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:06,781 INFO L93 Difference]: Finished difference Result 260269 states and 372958 transitions. [2020-10-28 18:17:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:17:06,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-28 18:17:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:07,314 INFO L225 Difference]: With dead ends: 260269 [2020-10-28 18:17:07,314 INFO L226 Difference]: Without dead ends: 193166 [2020-10-28 18:17:07,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193166 states. [2020-10-28 18:17:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193166 to 193160. [2020-10-28 18:17:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193160 states. [2020-10-28 18:17:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193160 states to 193160 states and 274206 transitions. [2020-10-28 18:17:22,885 INFO L78 Accepts]: Start accepts. Automaton has 193160 states and 274206 transitions. Word has length 170 [2020-10-28 18:17:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:22,886 INFO L481 AbstractCegarLoop]: Abstraction has 193160 states and 274206 transitions. [2020-10-28 18:17:22,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 193160 states and 274206 transitions. [2020-10-28 18:17:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:17:22,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:22,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:22,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:17:22,969 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1791096958, now seen corresponding path program 1 times [2020-10-28 18:17:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:22,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758702255] [2020-10-28 18:17:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:25,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 18:17:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:28,450 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:17:28,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:28,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:28,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758702255] [2020-10-28 18:17:28,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:28,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779608781] [2020-10-28 18:17:28,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:28,519 INFO L87 Difference]: Start difference. First operand 193160 states and 274206 transitions. Second operand 5 states. [2020-10-28 18:17:28,926 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 206