/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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:26:08,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:26:08,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:26:08,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:26:08,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:26:08,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:26:08,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:26:08,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:26:08,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:26:08,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:26:08,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:26:08,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:26:08,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:26:08,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:26:08,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:26:08,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:26:08,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:26:08,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:26:08,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:26:08,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:26:08,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:26:08,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:26:08,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:26:08,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:26:08,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:26:08,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:26:08,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:26:08,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:26:08,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:26:08,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:26:08,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:26:08,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:26:08,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:26:08,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:26:08,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:26:08,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:26:08,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:26:08,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:26:08,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:26:08,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:26:08,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:26:08,742 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 19:26:08,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:26:08,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:26:08,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:26:08,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:26:08,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:26:08,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:26:08,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:26:08,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:26:08,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:26:08,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:26:08,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:26:08,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:26:08,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:26:08,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:26:08,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:26:08,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:26:08,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:26:08,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:26:08,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:26:08,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:26:08,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:26:08,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:26:08,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:26:08,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:26:08,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:26:08,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:26:08,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:26:08,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:26:08,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:26:08,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:26:09,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:26:09,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:26:09,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:26:09,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:26:09,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:26:09,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:26:09,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aa44133d/ab944cfe690849d782873aa1789e5e75/FLAGd00b42c63 [2020-10-28 19:26:10,138 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:26:10,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:26:10,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aa44133d/ab944cfe690849d782873aa1789e5e75/FLAGd00b42c63 [2020-10-28 19:26:10,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0aa44133d/ab944cfe690849d782873aa1789e5e75 [2020-10-28 19:26:10,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:26:10,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:26:10,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:26:10,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:26:10,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:26:10,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:26:10" (1/1) ... [2020-10-28 19:26:10,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151a1137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:10, skipping insertion in model container [2020-10-28 19:26:10,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:26:10" (1/1) ... [2020-10-28 19:26:10,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:26:10,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:26:12,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:26:12,300 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:26:13,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:26:13,266 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:26:13,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13 WrapperNode [2020-10-28 19:26:13,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:26:13,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:26:13,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:26:13,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:26:13,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (1/1) ... [2020-10-28 19:26:13,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:26:13,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:26:13,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:26:13,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:26:13,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (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 19:26:13,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:26:13,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:26:13,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:26:13,604 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:26:13,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:26:13,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:26:13,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:26:13,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:26:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:26:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:26:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:26:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:26:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:26:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:26:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:26:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:26:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:26:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:26:17,924 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:26:17,924 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:26:17,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:26:17 BoogieIcfgContainer [2020-10-28 19:26:17,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:26:17,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:26:17,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:26:17,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:26:17,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:26:10" (1/3) ... [2020-10-28 19:26:17,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a459c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:26:17, skipping insertion in model container [2020-10-28 19:26:17,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:13" (2/3) ... [2020-10-28 19:26:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a459c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:26:17, skipping insertion in model container [2020-10-28 19:26:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:26:17" (3/3) ... [2020-10-28 19:26:17,937 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:26:17,949 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:26:17,954 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:26:17,967 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:26:18,001 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:26:18,002 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:26:18,002 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:26:18,002 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:26:18,002 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:26:18,002 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:26:18,002 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:26:18,003 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:26:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states. [2020-10-28 19:26:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-28 19:26:18,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:18,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:18,092 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash -937803504, now seen corresponding path program 1 times [2020-10-28 19:26:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:18,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137674705] [2020-10-28 19:26:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:22,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:24,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:24,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:24,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:24,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-28 19:26:24,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:26:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5272 [2020-10-28 19:26:24,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:24,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:24,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-28 19:26:24,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:26:26,452 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:26:26,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:26,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:26,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:26,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:26,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 19:26:26,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:26,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:26,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:27,119 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 19:26:27,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137674705] [2020-10-28 19:26:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578311690] [2020-10-28 19:26:27,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:27,152 INFO L87 Difference]: Start difference. First operand 1435 states. Second operand 5 states. [2020-10-28 19:26:42,211 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 19:26:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:45,485 INFO L93 Difference]: Finished difference Result 4178 states and 7520 transitions. [2020-10-28 19:26:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:26:45,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-28 19:26:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:45,530 INFO L225 Difference]: With dead ends: 4178 [2020-10-28 19:26:45,530 INFO L226 Difference]: Without dead ends: 2784 [2020-10-28 19:26:45,545 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 19:26:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2020-10-28 19:26:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2781. [2020-10-28 19:26:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2781 states. [2020-10-28 19:26:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 4580 transitions. [2020-10-28 19:26:45,781 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 4580 transitions. Word has length 488 [2020-10-28 19:26:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:45,783 INFO L481 AbstractCegarLoop]: Abstraction has 2781 states and 4580 transitions. [2020-10-28 19:26:45,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 4580 transitions. [2020-10-28 19:26:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-28 19:26:45,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:45,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:45,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:26:45,800 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash 101183856, now seen corresponding path program 1 times [2020-10-28 19:26:45,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:45,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418102224] [2020-10-28 19:26:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:46,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:48,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:49,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:50,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 498 [2020-10-28 19:26:50,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:26:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 19:26:50,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:50,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 248 [2020-10-28 19:26:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:52,574 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:26:52,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:52,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:52,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:52,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:52,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:26:52,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:52,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:53,248 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 19:26:53,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418102224] [2020-10-28 19:26:53,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:53,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486599274] [2020-10-28 19:26:53,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:53,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:53,264 INFO L87 Difference]: Start difference. First operand 2781 states and 4580 transitions. Second operand 5 states. [2020-10-28 19:27:08,353 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 19:27:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:11,797 INFO L93 Difference]: Finished difference Result 8165 states and 13430 transitions. [2020-10-28 19:27:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:11,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-10-28 19:27:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:11,828 INFO L225 Difference]: With dead ends: 8165 [2020-10-28 19:27:11,829 INFO L226 Difference]: Without dead ends: 5498 [2020-10-28 19:27:11,836 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 19:27:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2020-10-28 19:27:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5495. [2020-10-28 19:27:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5495 states. [2020-10-28 19:27:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5495 states to 5495 states and 9018 transitions. [2020-10-28 19:27:12,149 INFO L78 Accepts]: Start accepts. Automaton has 5495 states and 9018 transitions. Word has length 490 [2020-10-28 19:27:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:12,150 INFO L481 AbstractCegarLoop]: Abstraction has 5495 states and 9018 transitions. [2020-10-28 19:27:12,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 5495 states and 9018 transitions. [2020-10-28 19:27:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-10-28 19:27:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:12,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:12,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:27:12,171 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 546113712, now seen corresponding path program 1 times [2020-10-28 19:27:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:12,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571584108] [2020-10-28 19:27:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:12,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:12,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:17,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 500 [2020-10-28 19:27:17,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:27:17,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 19:27:17,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:17,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 19:27:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 305 [2020-10-28 19:27:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:18,746 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:27:18,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:18,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:18,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:19,226 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 19:27:19,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571584108] [2020-10-28 19:27:19,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:19,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319975991] [2020-10-28 19:27:19,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:19,229 INFO L87 Difference]: Start difference. First operand 5495 states and 9018 transitions. Second operand 4 states. [2020-10-28 19:27:37,512 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-28 19:27:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:40,665 INFO L93 Difference]: Finished difference Result 16025 states and 26237 transitions. [2020-10-28 19:27:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:27:40,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-10-28 19:27:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:40,718 INFO L225 Difference]: With dead ends: 16025 [2020-10-28 19:27:40,718 INFO L226 Difference]: Without dead ends: 10878 [2020-10-28 19:27:40,730 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 19:27:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10878 states. [2020-10-28 19:27:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10878 to 10875. [2020-10-28 19:27:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10875 states. [2020-10-28 19:27:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10875 states to 10875 states and 17785 transitions. [2020-10-28 19:27:41,291 INFO L78 Accepts]: Start accepts. Automaton has 10875 states and 17785 transitions. Word has length 492 [2020-10-28 19:27:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:41,291 INFO L481 AbstractCegarLoop]: Abstraction has 10875 states and 17785 transitions. [2020-10-28 19:27:41,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:27:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10875 states and 17785 transitions. [2020-10-28 19:27:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-28 19:27:41,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:41,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:41,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:27:41,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1921462926, now seen corresponding path program 1 times [2020-10-28 19:27:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:41,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879963866] [2020-10-28 19:27:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:41,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:43,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 501 [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:46,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:27:46,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 294 [2020-10-28 19:27:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:47,858 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:27:47,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:47,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:47,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:47,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:27:47,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:47,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:48,306 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 19:27:48,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879963866] [2020-10-28 19:27:48,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:48,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650730004] [2020-10-28 19:27:48,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:48,308 INFO L87 Difference]: Start difference. First operand 10875 states and 17785 transitions. Second operand 4 states. [2020-10-28 19:28:06,875 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-28 19:28:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:10,102 INFO L93 Difference]: Finished difference Result 31673 states and 51653 transitions. [2020-10-28 19:28:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:28:10,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-10-28 19:28:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:10,166 INFO L225 Difference]: With dead ends: 31673 [2020-10-28 19:28:10,167 INFO L226 Difference]: Without dead ends: 21414 [2020-10-28 19:28:10,191 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 19:28:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21414 states. [2020-10-28 19:28:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21414 to 21411. [2020-10-28 19:28:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21411 states. [2020-10-28 19:28:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21411 states to 21411 states and 34861 transitions. [2020-10-28 19:28:11,332 INFO L78 Accepts]: Start accepts. Automaton has 21411 states and 34861 transitions. Word has length 493 [2020-10-28 19:28:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:11,333 INFO L481 AbstractCegarLoop]: Abstraction has 21411 states and 34861 transitions. [2020-10-28 19:28:11,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:28:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21411 states and 34861 transitions. [2020-10-28 19:28:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 19:28:11,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:11,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:11,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:28:11,385 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -306554924, now seen corresponding path program 1 times [2020-10-28 19:28:11,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:11,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030592919] [2020-10-28 19:28:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:11,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:11,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:11,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:12,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:12,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:13,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-28 19:28:16,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 250 [2020-10-28 19:28:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:17,891 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:28:17,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:17,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:17,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:17,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:28:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:17,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:17,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:17,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:28:18,242 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 19:28:18,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030592919] [2020-10-28 19:28:18,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:18,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:28:18,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579293159] [2020-10-28 19:28:18,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:28:18,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:28:18,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:28:18,245 INFO L87 Difference]: Start difference. First operand 21411 states and 34861 transitions. Second operand 4 states. [2020-10-28 19:28:37,770 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-28 19:28:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:41,167 INFO L93 Difference]: Finished difference Result 62497 states and 101494 transitions. [2020-10-28 19:28:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:28:41,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-10-28 19:28:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:41,253 INFO L225 Difference]: With dead ends: 62497 [2020-10-28 19:28:41,253 INFO L226 Difference]: Without dead ends: 42062 [2020-10-28 19:28:41,308 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 19:28:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42062 states. [2020-10-28 19:28:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42062 to 42059. [2020-10-28 19:28:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42059 states. [2020-10-28 19:28:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42059 states to 42059 states and 68150 transitions. [2020-10-28 19:28:43,118 INFO L78 Accepts]: Start accepts. Automaton has 42059 states and 68150 transitions. Word has length 494 [2020-10-28 19:28:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:43,118 INFO L481 AbstractCegarLoop]: Abstraction has 42059 states and 68150 transitions. [2020-10-28 19:28:43,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:28:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 42059 states and 68150 transitions. [2020-10-28 19:28:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 19:28:43,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:43,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:43,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:28:43,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1222320303, now seen corresponding path program 1 times [2020-10-28 19:28:43,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:43,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375633394] [2020-10-28 19:28:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:48,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:48,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-28 19:28:48,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:28:48,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 19:28:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:49,657 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:28:49,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:49,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:49,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:50,050 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 19:28:50,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375633394] [2020-10-28 19:28:50,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:50,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:28:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069398565] [2020-10-28 19:28:50,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:28:50,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:28:50,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:28:50,053 INFO L87 Difference]: Start difference. First operand 42059 states and 68150 transitions. Second operand 4 states. [2020-10-28 19:29:11,060 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-28 19:29:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:14,801 INFO L93 Difference]: Finished difference Result 123493 states and 199692 transitions. [2020-10-28 19:29:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:29:14,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-10-28 19:29:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:14,965 INFO L225 Difference]: With dead ends: 123493 [2020-10-28 19:29:14,965 INFO L226 Difference]: Without dead ends: 82794 [2020-10-28 19:29:15,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82794 states. [2020-10-28 19:29:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82794 to 82791. [2020-10-28 19:29:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82791 states. [2020-10-28 19:29:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82791 states to 82791 states and 133514 transitions. [2020-10-28 19:29:18,807 INFO L78 Accepts]: Start accepts. Automaton has 82791 states and 133514 transitions. Word has length 494 [2020-10-28 19:29:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:18,807 INFO L481 AbstractCegarLoop]: Abstraction has 82791 states and 133514 transitions. [2020-10-28 19:29:18,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:29:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 82791 states and 133514 transitions. [2020-10-28 19:29:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 19:29:18,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:18,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:29:18,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:29:18,907 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1476439372, now seen corresponding path program 1 times [2020-10-28 19:29:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:18,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061893887] [2020-10-28 19:29:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:18,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-28 19:29:23,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:25,439 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:29:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:25,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:25,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:25,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:25,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:29:25,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:25,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:25,956 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 19:29:25,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061893887] [2020-10-28 19:29:25,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374965825] [2020-10-28 19:29:25,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:25,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:25,959 INFO L87 Difference]: Start difference. First operand 82791 states and 133514 transitions. Second operand 5 states. [2020-10-28 19:29:45,048 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-28 19:29:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:49,615 INFO L93 Difference]: Finished difference Result 241033 states and 387531 transitions. [2020-10-28 19:29:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:49,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-10-28 19:29:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:49,906 INFO L225 Difference]: With dead ends: 241033 [2020-10-28 19:29:49,907 INFO L226 Difference]: Without dead ends: 161734 [2020-10-28 19:29:50,014 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 19:29:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161734 states.