/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.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:22:55,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:22:55,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:22:55,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:22:55,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:22:55,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:22:55,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:22:55,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:22:55,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:22:55,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:22:55,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:22:55,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:22:55,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:22:55,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:22:55,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:22:55,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:22:55,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:22:55,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:22:55,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:22:55,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:22:55,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:22:55,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:22:55,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:22:55,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:22:55,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:22:55,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:22:55,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:22:55,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:22:55,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:22:55,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:22:55,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:22:55,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:22:55,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:22:55,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:22:55,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:22:55,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:22:55,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:22:55,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:22:55,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:22:55,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:22:55,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:22:55,717 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 18:22:55,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:22:55,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:22:55,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:22:55,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:22:55,773 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:22:55,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:22:55,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:22:55,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:22:55,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:22:55,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:22:55,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:22:55,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:22:55,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:22:55,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:22:55,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:22:55,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:22:55,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:22:55,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:22:55,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:22:55,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:22:55,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:22:55,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:22:55,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:22:55,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:22:55,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:22:55,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:22:55,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:22:55,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:22:55,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:22:55,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:22:56,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:22:56,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:22:56,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:22:56,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:22:56,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:22:56,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 18:22:56,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06abd38b/be0b2f6414bb4f36b8233c14c801ea33/FLAG3c9a8c383 [2020-10-28 18:22:57,274 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:22:57,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 18:22:57,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06abd38b/be0b2f6414bb4f36b8233c14c801ea33/FLAG3c9a8c383 [2020-10-28 18:22:57,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06abd38b/be0b2f6414bb4f36b8233c14c801ea33 [2020-10-28 18:22:57,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:22:57,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:22:57,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:22:57,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:22:57,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:22:57,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:22:57" (1/1) ... [2020-10-28 18:22:57,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ac9f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:22:57, skipping insertion in model container [2020-10-28 18:22:57,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:22:57" (1/1) ... [2020-10-28 18:22:57,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:22:57,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:22:59,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:22:59,439 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:23:00,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:23:00,387 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:23:00,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00 WrapperNode [2020-10-28 18:23:00,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:23:00,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:23:00,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:23:00,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:23:00,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (1/1) ... [2020-10-28 18:23:00,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:23:00,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:23:00,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:23:00,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:23:00,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (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 18:23:00,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:23:00,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:23:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:23:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:23:00,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:23:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:23:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:23:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:23:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:23:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:23:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:23:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:23:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:23:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:23:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:23:00,707 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:23:00,707 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:23:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:23:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:23:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:23:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:23:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:23:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:23:00,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:23:05,111 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:23:05,112 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:23:05,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:23:05 BoogieIcfgContainer [2020-10-28 18:23:05,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:23:05,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:23:05,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:23:05,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:23:05,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:22:57" (1/3) ... [2020-10-28 18:23:05,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248db38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:23:05, skipping insertion in model container [2020-10-28 18:23:05,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:00" (2/3) ... [2020-10-28 18:23:05,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248db38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:23:05, skipping insertion in model container [2020-10-28 18:23:05,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:23:05" (3/3) ... [2020-10-28 18:23:05,125 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 18:23:05,137 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:23:05,153 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:23:05,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:23:05,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:23:05,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:23:05,205 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:23:05,205 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:23:05,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:23:05,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:23:05,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:23:05,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:23:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states. [2020-10-28 18:23:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-28 18:23:05,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:05,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:05,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 75514757, now seen corresponding path program 1 times [2020-10-28 18:23:05,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:05,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725507000] [2020-10-28 18:23:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:08,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:12,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:12,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-28 18:23:12,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:23:12,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 18:23:12,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:12,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:23:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:23:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-28 18:23:12,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:23:14,119 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:23:14,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:14,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:14,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:14,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:14,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:14,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 18:23:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:14,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:23:14,953 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 18:23:14,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725507000] [2020-10-28 18:23:14,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:14,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:23:14,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038908320] [2020-10-28 18:23:14,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:23:14,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:23:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:23:14,981 INFO L87 Difference]: Start difference. First operand 1375 states. Second operand 5 states. [2020-10-28 18:23:32,141 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 18:23:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:23:35,249 INFO L93 Difference]: Finished difference Result 4054 states and 7341 transitions. [2020-10-28 18:23:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:23:35,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-10-28 18:23:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:23:35,292 INFO L225 Difference]: With dead ends: 4054 [2020-10-28 18:23:35,292 INFO L226 Difference]: Without dead ends: 2692 [2020-10-28 18:23:35,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:23:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2020-10-28 18:23:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2672. [2020-10-28 18:23:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2672 states. [2020-10-28 18:23:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 4392 transitions. [2020-10-28 18:23:35,525 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 4392 transitions. Word has length 465 [2020-10-28 18:23:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:23:35,527 INFO L481 AbstractCegarLoop]: Abstraction has 2672 states and 4392 transitions. [2020-10-28 18:23:35,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:23:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 4392 transitions. [2020-10-28 18:23:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-10-28 18:23:35,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:35,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:23:35,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:23:35,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:35,544 INFO L82 PathProgramCache]: Analyzing trace with hash -488369247, now seen corresponding path program 1 times [2020-10-28 18:23:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:35,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287352872] [2020-10-28 18:23:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:35,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:35,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:37,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:40,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:40,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:40,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:40,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 475 [2020-10-28 18:23:40,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:23:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-28 18:23:40,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:40,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:23:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:23:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-28 18:23:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:42,319 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:23:42,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:42,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:42,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:42,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:42,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:23:42,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:42,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:42,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:23:42,771 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 18:23:42,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287352872] [2020-10-28 18:23:42,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:42,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:23:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023678595] [2020-10-28 18:23:42,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:23:42,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:23:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:23:42,775 INFO L87 Difference]: Start difference. First operand 2672 states and 4392 transitions. Second operand 4 states. [2020-10-28 18:24:01,086 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-28 18:24:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:03,866 INFO L93 Difference]: Finished difference Result 7713 states and 12639 transitions. [2020-10-28 18:24:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:24:03,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-10-28 18:24:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:03,897 INFO L225 Difference]: With dead ends: 7713 [2020-10-28 18:24:03,898 INFO L226 Difference]: Without dead ends: 5218 [2020-10-28 18:24:03,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2020-10-28 18:24:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5200. [2020-10-28 18:24:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2020-10-28 18:24:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 8514 transitions. [2020-10-28 18:24:04,127 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 8514 transitions. Word has length 467 [2020-10-28 18:24:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:04,128 INFO L481 AbstractCegarLoop]: Abstraction has 5200 states and 8514 transitions. [2020-10-28 18:24:04,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:24:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 8514 transitions. [2020-10-28 18:24:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-10-28 18:24:04,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:04,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:04,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:24:04,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1874695380, now seen corresponding path program 1 times [2020-10-28 18:24:04,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:04,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924241769] [2020-10-28 18:24:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:04,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:04,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:04,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:05,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:05,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:06,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:09,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:09,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 476 [2020-10-28 18:24:09,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:24:09,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 255 [2020-10-28 18:24:09,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:10,723 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:24:10,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:10,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:10,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:10,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:11,390 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 18:24:11,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924241769] [2020-10-28 18:24:11,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:11,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:24:11,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255417131] [2020-10-28 18:24:11,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:24:11,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:24:11,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:11,394 INFO L87 Difference]: Start difference. First operand 5200 states and 8514 transitions. Second operand 5 states. [2020-10-28 18:24:27,693 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 18:24:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:30,844 INFO L93 Difference]: Finished difference Result 15389 states and 25182 transitions. [2020-10-28 18:24:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:24:30,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 468 [2020-10-28 18:24:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:30,902 INFO L225 Difference]: With dead ends: 15389 [2020-10-28 18:24:30,902 INFO L226 Difference]: Without dead ends: 10302 [2020-10-28 18:24:30,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:24:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10302 states. [2020-10-28 18:24:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10302 to 10243. [2020-10-28 18:24:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10243 states. [2020-10-28 18:24:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10243 states to 10243 states and 16707 transitions. [2020-10-28 18:24:31,603 INFO L78 Accepts]: Start accepts. Automaton has 10243 states and 16707 transitions. Word has length 468 [2020-10-28 18:24:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:31,604 INFO L481 AbstractCegarLoop]: Abstraction has 10243 states and 16707 transitions. [2020-10-28 18:24:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:24:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10243 states and 16707 transitions. [2020-10-28 18:24:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-28 18:24:31,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:31,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:24:31,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:24:31,647 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash -618731536, now seen corresponding path program 1 times [2020-10-28 18:24:31,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:31,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998922564] [2020-10-28 18:24:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:31,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:34,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:35,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:36,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-28 18:24:36,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:24:36,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-28 18:24:36,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:38,171 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:24:38,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:38,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:38,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:38,585 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 18:24:38,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998922564] [2020-10-28 18:24:38,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:38,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:24:38,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365257039] [2020-10-28 18:24:38,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:24:38,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:38,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:24:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:24:38,588 INFO L87 Difference]: Start difference. First operand 10243 states and 16707 transitions. Second operand 4 states. [2020-10-28 18:24:57,302 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-28 18:25:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:00,255 INFO L93 Difference]: Finished difference Result 29748 states and 48380 transitions. [2020-10-28 18:25:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:25:00,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-10-28 18:25:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:00,320 INFO L225 Difference]: With dead ends: 29748 [2020-10-28 18:25:00,321 INFO L226 Difference]: Without dead ends: 20041 [2020-10-28 18:25:00,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20041 states. [2020-10-28 18:25:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20041 to 20025. [2020-10-28 18:25:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20025 states. [2020-10-28 18:25:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20025 states to 20025 states and 32505 transitions. [2020-10-28 18:25:01,534 INFO L78 Accepts]: Start accepts. Automaton has 20025 states and 32505 transitions. Word has length 470 [2020-10-28 18:25:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:01,535 INFO L481 AbstractCegarLoop]: Abstraction has 20025 states and 32505 transitions. [2020-10-28 18:25:01,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:25:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20025 states and 32505 transitions. [2020-10-28 18:25:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-28 18:25:01,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:01,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:01,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:25:01,597 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash -142484277, now seen corresponding path program 1 times [2020-10-28 18:25:01,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:01,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382836016] [2020-10-28 18:25:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:01,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:05,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:05,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:05,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:06,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:06,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:25:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-28 18:25:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:08,199 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:25:08,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:08,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:08,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:08,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:08,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:08,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:08,519 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 18:25:08,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382836016] [2020-10-28 18:25:08,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:08,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:25:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343004765] [2020-10-28 18:25:08,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:25:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:25:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:08,522 INFO L87 Difference]: Start difference. First operand 20025 states and 32505 transitions. Second operand 5 states. [2020-10-28 18:25:25,642 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 18:25:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:29,110 INFO L93 Difference]: Finished difference Result 58599 states and 94853 transitions. [2020-10-28 18:25:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:25:29,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 470 [2020-10-28 18:25:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:29,225 INFO L225 Difference]: With dead ends: 58599 [2020-10-28 18:25:29,225 INFO L226 Difference]: Without dead ends: 39402 [2020-10-28 18:25:29,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:25:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39402 states. [2020-10-28 18:25:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39402 to 39245. [2020-10-28 18:25:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39245 states. [2020-10-28 18:25:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39245 states to 39245 states and 63312 transitions. [2020-10-28 18:25:31,273 INFO L78 Accepts]: Start accepts. Automaton has 39245 states and 63312 transitions. Word has length 470 [2020-10-28 18:25:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:31,273 INFO L481 AbstractCegarLoop]: Abstraction has 39245 states and 63312 transitions. [2020-10-28 18:25:31,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:25:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39245 states and 63312 transitions. [2020-10-28 18:25:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-10-28 18:25:31,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:31,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:31,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:25:31,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1193328337, now seen corresponding path program 1 times [2020-10-28 18:25:31,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:31,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031397924] [2020-10-28 18:25:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:31,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:36,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:36,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-10-28 18:25:36,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 18:25:36,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-28 18:25:36,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:37,797 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:25:37,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:37,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:37,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:38,106 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 18:25:38,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031397924] [2020-10-28 18:25:38,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:38,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:25:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2511788] [2020-10-28 18:25:38,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:25:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:25:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:38,109 INFO L87 Difference]: Start difference. First operand 39245 states and 63312 transitions. Second operand 5 states. [2020-10-28 18:25:56,672 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 18:26:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:00,493 INFO L93 Difference]: Finished difference Result 114590 states and 184272 transitions. [2020-10-28 18:26:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:26:00,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 472 [2020-10-28 18:26:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:00,671 INFO L225 Difference]: With dead ends: 114590 [2020-10-28 18:26:00,671 INFO L226 Difference]: Without dead ends: 76897 [2020-10-28 18:26:00,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:26:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76897 states. [2020-10-28 18:26:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76897 to 76436. [2020-10-28 18:26:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76436 states. [2020-10-28 18:26:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76436 states to 76436 states and 122412 transitions. [2020-10-28 18:26:04,701 INFO L78 Accepts]: Start accepts. Automaton has 76436 states and 122412 transitions. Word has length 472 [2020-10-28 18:26:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:04,702 INFO L481 AbstractCegarLoop]: Abstraction has 76436 states and 122412 transitions. [2020-10-28 18:26:04,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:26:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 76436 states and 122412 transitions. [2020-10-28 18:26:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-28 18:26:04,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:04,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:04,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:26:04,793 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2002608347, now seen corresponding path program 1 times [2020-10-28 18:26:04,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:04,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355401921] [2020-10-28 18:26:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:04,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:04,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-28 18:26:09,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:11,385 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-28 18:26:11,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:11,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:11,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:11,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:11,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:11,745 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 18:26:11,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355401921] [2020-10-28 18:26:11,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:11,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:26:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314666412] [2020-10-28 18:26:11,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:26:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:26:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:11,748 INFO L87 Difference]: Start difference. First operand 76436 states and 122412 transitions. Second operand 5 states. [2020-10-28 18:26:33,508 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 427