/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_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:02:51,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:02:51,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:02:51,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:02:51,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:02:51,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:02:51,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:02:51,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:02:51,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:02:51,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:02:51,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:02:51,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:02:51,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:02:51,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:02:51,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:02:51,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:02:51,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:02:51,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:02:51,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:02:51,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:02:51,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:02:51,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:02:51,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:02:51,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:02:51,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:02:51,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:02:51,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:02:51,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:02:51,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:02:51,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:02:51,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:02:51,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:02:51,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:02:51,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:02:51,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:02:51,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:02:51,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:02:51,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:02:51,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:02:51,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:02:51,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:02:51,708 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 19:02:51,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:02:51,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:02:51,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:02:51,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:02:51,779 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:02:51,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:02:51,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:02:51,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:02:51,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:02:51,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:02:51,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:02:51,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:02:51,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:02:51,782 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:02:51,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:02:51,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:02:51,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:02:51,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:02:51,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:02:51,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:02:51,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:02:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:02:51,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:02:51,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:02:51,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:02:51,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:02:51,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:02:51,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:02:51,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:02:51,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:02:52,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:02:52,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:02:52,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:02:52,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:02:52,253 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:02:52,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:02:52,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7a7f577c/f86031746b734d0096b88151d8e9deb4/FLAG4ca3b70b5 [2020-10-28 19:02:53,061 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:02:53,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:02:53,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7a7f577c/f86031746b734d0096b88151d8e9deb4/FLAG4ca3b70b5 [2020-10-28 19:02:53,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7a7f577c/f86031746b734d0096b88151d8e9deb4 [2020-10-28 19:02:53,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:02:53,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:02:53,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:02:53,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:02:53,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:02:53,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:53,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c69b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53, skipping insertion in model container [2020-10-28 19:02:53,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:53,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:02:53,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:02:53,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:02:53,781 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:02:53,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:02:53,953 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:02:53,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53 WrapperNode [2020-10-28 19:02:53,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:02:53,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:02:53,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:02:53,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:02:53,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:53,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (1/1) ... [2020-10-28 19:02:54,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:02:54,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:02:54,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:02:54,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:02:54,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (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 19:02:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:02:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:02:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:02:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:02:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:02:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:02:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:02:54,201 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:02:54,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:02:54,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:02:54,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:02:54,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:02:54,203 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:02:54,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:02:54,204 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:02:54,205 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:02:54,205 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:02:54,205 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:02:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:02:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:02:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:02:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:02:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:02:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:02:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:02:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:02:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:02:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:02:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:02:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:02:55,394 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:02:55,394 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:02:55,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:02:55 BoogieIcfgContainer [2020-10-28 19:02:55,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:02:55,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:02:55,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:02:55,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:02:55,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:02:53" (1/3) ... [2020-10-28 19:02:55,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608c3a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:02:55, skipping insertion in model container [2020-10-28 19:02:55,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:53" (2/3) ... [2020-10-28 19:02:55,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608c3a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:02:55, skipping insertion in model container [2020-10-28 19:02:55,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:02:55" (3/3) ... [2020-10-28 19:02:55,419 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:02:55,433 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:02:55,438 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:02:55,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:02:55,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:02:55,502 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:02:55,502 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:02:55,502 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:02:55,502 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:02:55,502 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:02:55,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:02:55,503 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:02:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-28 19:02:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 19:02:55,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:55,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:02:55,554 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash -144079420, now seen corresponding path program 1 times [2020-10-28 19:02:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:55,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323930287] [2020-10-28 19:02:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:56,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:00,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 19:03:00,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:03:00,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:00,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:00,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:00,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:03:00,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:03:00,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:03:01,402 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:01,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:01,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:01,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:01,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:03:01,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:01,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:01,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:01,475 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 19:03:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323930287] [2020-10-28 19:03:01,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:01,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390833822] [2020-10-28 19:03:01,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:01,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:01,525 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2020-10-28 19:03:01,934 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:02,780 INFO L93 Difference]: Finished difference Result 341 states and 543 transitions. [2020-10-28 19:03:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:02,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 19:03:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:02,797 INFO L225 Difference]: With dead ends: 341 [2020-10-28 19:03:02,797 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 19:03:02,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 19:03:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-28 19:03:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 19:03:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 330 transitions. [2020-10-28 19:03:02,872 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 330 transitions. Word has length 66 [2020-10-28 19:03:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:02,873 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 330 transitions. [2020-10-28 19:03:02,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 330 transitions. [2020-10-28 19:03:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:03:02,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:02,876 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] [2020-10-28 19:03:02,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:03:02,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1439247370, now seen corresponding path program 1 times [2020-10-28 19:03:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510092582] [2020-10-28 19:03:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:05,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:05,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:03:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:03:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-10-28 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:05,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:05,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:03:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:03:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 19:03:05,622 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:05,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:05,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:05,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:05,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:05,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:03:05,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:05,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:05,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:05,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:05,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:05,679 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 19:03:05,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510092582] [2020-10-28 19:03:05,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:05,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533564825] [2020-10-28 19:03:05,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:05,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:05,697 INFO L87 Difference]: Start difference. First operand 222 states and 330 transitions. Second operand 4 states. [2020-10-28 19:03:06,045 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:06,901 INFO L93 Difference]: Finished difference Result 556 states and 860 transitions. [2020-10-28 19:03:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:06,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:03:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:06,906 INFO L225 Difference]: With dead ends: 556 [2020-10-28 19:03:06,906 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 19:03:06,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 19:03:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-10-28 19:03:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-28 19:03:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 565 transitions. [2020-10-28 19:03:06,976 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 565 transitions. Word has length 67 [2020-10-28 19:03:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:06,976 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 565 transitions. [2020-10-28 19:03:06,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 565 transitions. [2020-10-28 19:03:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 19:03:06,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:06,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:03:06,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:03:06,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1496172700, now seen corresponding path program 1 times [2020-10-28 19:03:06,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:06,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580379510] [2020-10-28 19:03:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:07,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:08,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:08,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:03:08,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:03:08,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-28 19:03:08,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:08,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:03:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:03:08,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:08,404 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:08,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:08,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:08,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:08,466 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 19:03:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580379510] [2020-10-28 19:03:08,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:08,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:08,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420664435] [2020-10-28 19:03:08,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:08,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:08,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:08,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:08,469 INFO L87 Difference]: Start difference. First operand 370 states and 565 transitions. Second operand 4 states. [2020-10-28 19:03:08,788 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:09,654 INFO L93 Difference]: Finished difference Result 968 states and 1513 transitions. [2020-10-28 19:03:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:09,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 19:03:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:09,659 INFO L225 Difference]: With dead ends: 968 [2020-10-28 19:03:09,660 INFO L226 Difference]: Without dead ends: 637 [2020-10-28 19:03:09,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-28 19:03:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 634. [2020-10-28 19:03:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-28 19:03:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 981 transitions. [2020-10-28 19:03:09,723 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 981 transitions. Word has length 68 [2020-10-28 19:03:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:09,724 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 981 transitions. [2020-10-28 19:03:09,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 981 transitions. [2020-10-28 19:03:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:03:09,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:09,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:03:09,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:03:09,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1467312907, now seen corresponding path program 1 times [2020-10-28 19:03:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:09,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060346573] [2020-10-28 19:03:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:09,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:10,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:03:10,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:03:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-28 19:03:10,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:10,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:03:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:03:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:10,744 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:10,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:10,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:03:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:10,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:10,798 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 19:03:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060346573] [2020-10-28 19:03:10,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458902964] [2020-10-28 19:03:10,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:10,805 INFO L87 Difference]: Start difference. First operand 634 states and 981 transitions. Second operand 4 states. [2020-10-28 19:03:11,118 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:12,019 INFO L93 Difference]: Finished difference Result 1696 states and 2657 transitions. [2020-10-28 19:03:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:12,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 19:03:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:12,028 INFO L225 Difference]: With dead ends: 1696 [2020-10-28 19:03:12,028 INFO L226 Difference]: Without dead ends: 1101 [2020-10-28 19:03:12,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-28 19:03:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1098. [2020-10-28 19:03:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-10-28 19:03:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1705 transitions. [2020-10-28 19:03:12,113 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1705 transitions. Word has length 69 [2020-10-28 19:03:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:12,114 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1705 transitions. [2020-10-28 19:03:12,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1705 transitions. [2020-10-28 19:03:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:03:12,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:12,118 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] [2020-10-28 19:03:12,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:03:12,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash -28463610, now seen corresponding path program 1 times [2020-10-28 19:03:12,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503687051] [2020-10-28 19:03:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:12,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:13,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:13,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:03:13,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:03:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-28 19:03:13,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:13,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:13,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:03:13,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:03:13,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:03:13,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:13,865 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:13,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:13,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:13,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:13,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:13,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:03:13,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:13,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:13,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:13,912 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 19:03:13,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503687051] [2020-10-28 19:03:13,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:13,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:03:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352887374] [2020-10-28 19:03:13,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:03:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:13,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:03:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:03:13,916 INFO L87 Difference]: Start difference. First operand 1098 states and 1705 transitions. Second operand 8 states. [2020-10-28 19:03:14,303 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 19:03:15,526 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 19:03:15,846 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:16,169 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 19:03:16,504 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 19:03:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:16,798 INFO L93 Difference]: Finished difference Result 7452 states and 11701 transitions. [2020-10-28 19:03:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:03:16,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 19:03:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:16,834 INFO L225 Difference]: With dead ends: 7452 [2020-10-28 19:03:16,835 INFO L226 Difference]: Without dead ends: 6393 [2020-10-28 19:03:16,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:03:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2020-10-28 19:03:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 2154. [2020-10-28 19:03:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-10-28 19:03:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3337 transitions. [2020-10-28 19:03:17,067 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3337 transitions. Word has length 70 [2020-10-28 19:03:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:17,068 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 3337 transitions. [2020-10-28 19:03:17,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:03:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3337 transitions. [2020-10-28 19:03:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:03:17,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:17,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:03:17,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:03:17,070 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1457190185, now seen corresponding path program 1 times [2020-10-28 19:03:17,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:17,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260217401] [2020-10-28 19:03:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:17,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:18,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:18,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:03:18,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:03:18,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-28 19:03:18,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:18,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:03:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 19:03:18,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:03:18,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:18,559 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:18,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:18,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:18,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:18,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:18,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:03:18,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:18,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:18,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:18,606 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 19:03:18,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260217401] [2020-10-28 19:03:18,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:18,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:03:18,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980988881] [2020-10-28 19:03:18,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:03:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:03:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:18,609 INFO L87 Difference]: Start difference. First operand 2154 states and 3337 transitions. Second operand 5 states. [2020-10-28 19:03:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:19,874 INFO L93 Difference]: Finished difference Result 4333 states and 6699 transitions. [2020-10-28 19:03:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:03:19,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 19:03:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:19,898 INFO L225 Difference]: With dead ends: 4333 [2020-10-28 19:03:19,898 INFO L226 Difference]: Without dead ends: 4330 [2020-10-28 19:03:19,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:03:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2020-10-28 19:03:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 2218. [2020-10-28 19:03:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2020-10-28 19:03:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3401 transitions. [2020-10-28 19:03:20,138 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3401 transitions. Word has length 71 [2020-10-28 19:03:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:20,139 INFO L481 AbstractCegarLoop]: Abstraction has 2218 states and 3401 transitions. [2020-10-28 19:03:20,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:03:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3401 transitions. [2020-10-28 19:03:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:03:20,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:20,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:03:20,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:03:20,141 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1925313705, now seen corresponding path program 1 times [2020-10-28 19:03:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289698263] [2020-10-28 19:03:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:20,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:21,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:21,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:03:21,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:03:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 19:03:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:21,343 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:21,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:21,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:21,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:21,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:21,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:03:21,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:21,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:21,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:21,397 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 19:03:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289698263] [2020-10-28 19:03:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55700341] [2020-10-28 19:03:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:21,401 INFO L87 Difference]: Start difference. First operand 2218 states and 3401 transitions. Second operand 4 states. [2020-10-28 19:03:21,699 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:22,651 INFO L93 Difference]: Finished difference Result 6352 states and 9741 transitions. [2020-10-28 19:03:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:22,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 19:03:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:22,674 INFO L225 Difference]: With dead ends: 6352 [2020-10-28 19:03:22,675 INFO L226 Difference]: Without dead ends: 4173 [2020-10-28 19:03:22,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2020-10-28 19:03:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4138. [2020-10-28 19:03:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4138 states. [2020-10-28 19:03:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 6281 transitions. [2020-10-28 19:03:23,055 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 6281 transitions. Word has length 72 [2020-10-28 19:03:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:23,055 INFO L481 AbstractCegarLoop]: Abstraction has 4138 states and 6281 transitions. [2020-10-28 19:03:23,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 6281 transitions. [2020-10-28 19:03:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:03:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:23,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:03:23,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:03:23,057 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -779262329, now seen corresponding path program 1 times [2020-10-28 19:03:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:23,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922395882] [2020-10-28 19:03:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:23,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:23,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:23,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:03:23,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:03:23,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-28 19:03:23,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:23,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:03:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:03:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 19:03:23,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:23,786 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:23,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:23,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:23,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:23,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:23,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:03:23,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:23,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:23,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:23,843 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 19:03:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922395882] [2020-10-28 19:03:23,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:23,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:03:23,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824011373] [2020-10-28 19:03:23,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:03:23,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:23,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:03:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:23,846 INFO L87 Difference]: Start difference. First operand 4138 states and 6281 transitions. Second operand 5 states. [2020-10-28 19:03:24,200 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:25,250 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:03:26,090 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:26,379 INFO L93 Difference]: Finished difference Result 8467 states and 12943 transitions. [2020-10-28 19:03:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:03:26,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 19:03:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:26,411 INFO L225 Difference]: With dead ends: 8467 [2020-10-28 19:03:26,411 INFO L226 Difference]: Without dead ends: 6288 [2020-10-28 19:03:26,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:03:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2020-10-28 19:03:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 6250. [2020-10-28 19:03:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6250 states. [2020-10-28 19:03:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 9481 transitions. [2020-10-28 19:03:26,892 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 9481 transitions. Word has length 73 [2020-10-28 19:03:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:26,892 INFO L481 AbstractCegarLoop]: Abstraction has 6250 states and 9481 transitions. [2020-10-28 19:03:26,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:03:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 9481 transitions. [2020-10-28 19:03:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:03:26,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:26,894 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] [2020-10-28 19:03:26,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:03:26,895 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash -364325285, now seen corresponding path program 1 times [2020-10-28 19:03:26,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:26,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037883166] [2020-10-28 19:03:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:26,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:26,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:27,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:27,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:28,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:28,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:03:28,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:03:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2007 [2020-10-28 19:03:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:28,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:03:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:03:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:29,221 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:29,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:29,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:29,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:29,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:29,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:29,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:03:29,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:29,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:29,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:29,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:29,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:29,264 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 19:03:29,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037883166] [2020-10-28 19:03:29,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:29,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:29,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678848958] [2020-10-28 19:03:29,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:29,267 INFO L87 Difference]: Start difference. First operand 6250 states and 9481 transitions. Second operand 4 states. [2020-10-28 19:03:29,580 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:31,208 INFO L93 Difference]: Finished difference Result 13498 states and 20476 transitions. [2020-10-28 19:03:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:31,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 19:03:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:31,252 INFO L225 Difference]: With dead ends: 13498 [2020-10-28 19:03:31,252 INFO L226 Difference]: Without dead ends: 9391 [2020-10-28 19:03:31,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2020-10-28 19:03:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 9388. [2020-10-28 19:03:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9388 states. [2020-10-28 19:03:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9388 states to 9388 states and 14155 transitions. [2020-10-28 19:03:32,064 INFO L78 Accepts]: Start accepts. Automaton has 9388 states and 14155 transitions. Word has length 74 [2020-10-28 19:03:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:32,064 INFO L481 AbstractCegarLoop]: Abstraction has 9388 states and 14155 transitions. [2020-10-28 19:03:32,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9388 states and 14155 transitions. [2020-10-28 19:03:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:03:32,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:32,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:32,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:03:32,071 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 422549186, now seen corresponding path program 1 times [2020-10-28 19:03:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:32,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844899137] [2020-10-28 19:03:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:32,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:33,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:37,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:37,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:03:37,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:03:37,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:03:37,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:37,473 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:37,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:37,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:37,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:03:37,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:37,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:37,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:37,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844899137] [2020-10-28 19:03:37,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:37,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:37,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425401683] [2020-10-28 19:03:37,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:37,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:37,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:37,537 INFO L87 Difference]: Start difference. First operand 9388 states and 14155 transitions. Second operand 4 states. [2020-10-28 19:03:37,853 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:39,332 INFO L93 Difference]: Finished difference Result 27202 states and 40943 transitions. [2020-10-28 19:03:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:39,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:03:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:39,380 INFO L225 Difference]: With dead ends: 27202 [2020-10-28 19:03:39,381 INFO L226 Difference]: Without dead ends: 17855 [2020-10-28 19:03:39,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17855 states. [2020-10-28 19:03:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17855 to 17852. [2020-10-28 19:03:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17852 states. [2020-10-28 19:03:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17852 states to 17852 states and 26667 transitions. [2020-10-28 19:03:40,666 INFO L78 Accepts]: Start accepts. Automaton has 17852 states and 26667 transitions. Word has length 99 [2020-10-28 19:03:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:40,667 INFO L481 AbstractCegarLoop]: Abstraction has 17852 states and 26667 transitions. [2020-10-28 19:03:40,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17852 states and 26667 transitions. [2020-10-28 19:03:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:03:40,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:40,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:40,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:03:40,675 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1527371219, now seen corresponding path program 1 times [2020-10-28 19:03:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:40,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382880346] [2020-10-28 19:03:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:40,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:40,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:40,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:41,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:45,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:45,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 19:03:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:03:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:45,999 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:46,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:46,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:46,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:03:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:46,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:46,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382880346] [2020-10-28 19:03:46,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:46,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318010521] [2020-10-28 19:03:46,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:46,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:46,103 INFO L87 Difference]: Start difference. First operand 17852 states and 26667 transitions. Second operand 4 states. [2020-10-28 19:03:46,401 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:03:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:48,694 INFO L93 Difference]: Finished difference Result 51714 states and 77039 transitions. [2020-10-28 19:03:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:48,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:03:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:48,781 INFO L225 Difference]: With dead ends: 51714 [2020-10-28 19:03:48,782 INFO L226 Difference]: Without dead ends: 33903 [2020-10-28 19:03:48,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33903 states. [2020-10-28 19:03:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33903 to 33900. [2020-10-28 19:03:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33900 states. [2020-10-28 19:03:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33900 states to 33900 states and 50091 transitions. [2020-10-28 19:03:51,161 INFO L78 Accepts]: Start accepts. Automaton has 33900 states and 50091 transitions. Word has length 99 [2020-10-28 19:03:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:51,161 INFO L481 AbstractCegarLoop]: Abstraction has 33900 states and 50091 transitions. [2020-10-28 19:03:51,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33900 states and 50091 transitions. [2020-10-28 19:03:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:03:51,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:51,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:51,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:03:51,173 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash -114707282, now seen corresponding path program 1 times [2020-10-28 19:03:51,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:51,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390885586] [2020-10-28 19:03:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:51,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:54,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:56,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 19:03:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:03:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:56,513 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:03:56,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:56,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:56,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:56,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:56,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:03:56,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:56,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:56,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390885586] [2020-10-28 19:03:56,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:56,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:56,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609484246] [2020-10-28 19:03:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:56,559 INFO L87 Difference]: Start difference. First operand 33900 states and 50091 transitions. Second operand 4 states. [2020-10-28 19:03:56,895 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:04:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:00,950 INFO L93 Difference]: Finished difference Result 98098 states and 144431 transitions. [2020-10-28 19:04:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:00,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:04:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:01,102 INFO L225 Difference]: With dead ends: 98098 [2020-10-28 19:04:01,102 INFO L226 Difference]: Without dead ends: 64239 [2020-10-28 19:04:01,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64239 states. [2020-10-28 19:04:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64239 to 64236. [2020-10-28 19:04:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64236 states. [2020-10-28 19:04:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64236 states to 64236 states and 93739 transitions. [2020-10-28 19:04:06,085 INFO L78 Accepts]: Start accepts. Automaton has 64236 states and 93739 transitions. Word has length 99 [2020-10-28 19:04:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:06,086 INFO L481 AbstractCegarLoop]: Abstraction has 64236 states and 93739 transitions. [2020-10-28 19:04:06,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 64236 states and 93739 transitions. [2020-10-28 19:04:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:04:06,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:06,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:06,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:04:06,113 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1973251141, now seen corresponding path program 1 times [2020-10-28 19:04:06,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:06,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873568401] [2020-10-28 19:04:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:06,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:06,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:11,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:11,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:04:11,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:04:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:04:11,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:11,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 19:04:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 19:04:11,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:11,622 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:04:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:11,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:11,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:11,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:11,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:04:11,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:11,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:11,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:04:11,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873568401] [2020-10-28 19:04:11,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:11,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:11,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387901439] [2020-10-28 19:04:11,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:11,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:11,666 INFO L87 Difference]: Start difference. First operand 64236 states and 93739 transitions. Second operand 4 states. [2020-10-28 19:04:11,993 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:04:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:19,285 INFO L93 Difference]: Finished difference Result 185586 states and 269615 transitions. [2020-10-28 19:04:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:19,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:04:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:19,753 INFO L225 Difference]: With dead ends: 185586 [2020-10-28 19:04:19,754 INFO L226 Difference]: Without dead ends: 121391 [2020-10-28 19:04:19,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121391 states. [2020-10-28 19:04:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121391 to 121388. [2020-10-28 19:04:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121388 states. [2020-10-28 19:04:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121388 states to 121388 states and 174635 transitions. [2020-10-28 19:04:28,029 INFO L78 Accepts]: Start accepts. Automaton has 121388 states and 174635 transitions. Word has length 99 [2020-10-28 19:04:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:28,029 INFO L481 AbstractCegarLoop]: Abstraction has 121388 states and 174635 transitions. [2020-10-28 19:04:28,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:04:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 121388 states and 174635 transitions. [2020-10-28 19:04:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 19:04:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:28,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:04:28,056 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1042424203, now seen corresponding path program 1 times [2020-10-28 19:04:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561850099] [2020-10-28 19:04:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:28,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:28,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:32,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 19:04:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4462 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:04:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:32,856 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:04:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:32,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:04:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561850099] [2020-10-28 19:04:32,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:32,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:04:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073098643] [2020-10-28 19:04:32,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:04:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:04:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:04:32,897 INFO L87 Difference]: Start difference. First operand 121388 states and 174635 transitions. Second operand 4 states. [2020-10-28 19:04:33,213 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:04:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:47,473 INFO L93 Difference]: Finished difference Result 348210 states and 498223 transitions. [2020-10-28 19:04:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:04:47,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 19:04:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:48,121 INFO L225 Difference]: With dead ends: 348210 [2020-10-28 19:04:48,122 INFO L226 Difference]: Without dead ends: 226863 [2020-10-28 19:04:48,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:04:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226863 states. [2020-10-28 19:05:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226863 to 226860. [2020-10-28 19:05:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226860 states. [2020-10-28 19:05:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226860 states to 226860 states and 321067 transitions. [2020-10-28 19:05:03,919 INFO L78 Accepts]: Start accepts. Automaton has 226860 states and 321067 transitions. Word has length 100 [2020-10-28 19:05:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:03,920 INFO L481 AbstractCegarLoop]: Abstraction has 226860 states and 321067 transitions. [2020-10-28 19:05:03,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 226860 states and 321067 transitions. [2020-10-28 19:05:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 19:05:03,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:03,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:03,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:05:03,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash -637483701, now seen corresponding path program 1 times [2020-10-28 19:05:03,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:03,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244726124] [2020-10-28 19:05:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:08,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:08,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 19:05:08,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:05:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:09,321 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:09,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:09,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:09,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:05:09,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:09,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:09,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:09,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:09,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244726124] [2020-10-28 19:05:09,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:09,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:09,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116431108] [2020-10-28 19:05:09,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:09,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:09,352 INFO L87 Difference]: Start difference. First operand 226860 states and 321067 transitions. Second operand 4 states. [2020-10-28 19:05:13,960 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 19:05:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:20,980 INFO L93 Difference]: Finished difference Result 383792 states and 543432 transitions. [2020-10-28 19:05:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:20,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 19:05:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:21,260 INFO L225 Difference]: With dead ends: 383792 [2020-10-28 19:05:21,260 INFO L226 Difference]: Without dead ends: 156973 [2020-10-28 19:05:21,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156973 states.