/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.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:09:18,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:09:18,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:09:18,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:09:18,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:09:18,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:09:18,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:09:18,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:09:18,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:09:18,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:09:18,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:09:18,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:09:18,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:09:18,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:09:18,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:09:18,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:09:18,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:09:18,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:09:18,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:09:18,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:09:18,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:09:18,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:09:18,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:09:18,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:09:18,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:09:18,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:09:18,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:09:18,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:09:18,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:09:18,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:09:18,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:09:18,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:09:18,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:09:18,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:09:18,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:09:18,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:09:18,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:09:18,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:09:18,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:09:18,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:09:18,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:09:18,872 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 19:09:18,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:09:18,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:09:18,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:09:18,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:09:18,933 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:09:18,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:09:18,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:09:18,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:09:18,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:09:18,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:09:18,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:09:18,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:09:18,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:09:18,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:09:18,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:09:18,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:09:18,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:09:18,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:09:18,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:09:18,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:09:18,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:09:18,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:09:18,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:09:18,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:09:18,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:09:18,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:09:18,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:09:18,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:09:18,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:09:18,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:09:19,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:09:19,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:09:19,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:09:19,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:09:19,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:09:19,468 INFO L432 ainManager$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.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:09:19,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59c5c7cab/c2ce80208fa24fa684d5d67da4163e7d/FLAG88105e0cc [2020-10-28 19:09:20,301 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:09:20,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:09:20,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59c5c7cab/c2ce80208fa24fa684d5d67da4163e7d/FLAG88105e0cc [2020-10-28 19:09:20,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59c5c7cab/c2ce80208fa24fa684d5d67da4163e7d [2020-10-28 19:09:20,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:09:20,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:09:20,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:09:20,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:09:20,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:09:20,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:09:20" (1/1) ... [2020-10-28 19:09:20,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c727886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:20, skipping insertion in model container [2020-10-28 19:09:20,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:09:20" (1/1) ... [2020-10-28 19:09:20,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:09:20,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:09:21,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:09:21,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:09:21,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:09:21,174 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:09:21,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21 WrapperNode [2020-10-28 19:09:21,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:09:21,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:09:21,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:09:21,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:09:21,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (1/1) ... [2020-10-28 19:09:21,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:09:21,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:09:21,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:09:21,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:09:21,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (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 19:09:21,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:09:21,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:09:21,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:09:21,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:09:21,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:09:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:09:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:09:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:09:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:09:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:09:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:09:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:09:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:09:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:09:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:09:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:09:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:09:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:09:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:09:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:09:22,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:09:22,234 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:09:22,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:09:22 BoogieIcfgContainer [2020-10-28 19:09:22,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:09:22,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:09:22,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:09:22,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:09:22,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:09:20" (1/3) ... [2020-10-28 19:09:22,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1211adc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:09:22, skipping insertion in model container [2020-10-28 19:09:22,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:09:21" (2/3) ... [2020-10-28 19:09:22,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1211adc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:09:22, skipping insertion in model container [2020-10-28 19:09:22,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:09:22" (3/3) ... [2020-10-28 19:09:22,247 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:09:22,259 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:09:22,265 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:09:22,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:09:22,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:09:22,315 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:09:22,315 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:09:22,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:09:22,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:09:22,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:09:22,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:09:22,316 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:09:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-10-28 19:09:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:09:22,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:22,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:22,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:22,365 INFO L82 PathProgramCache]: Analyzing trace with hash -175058654, now seen corresponding path program 1 times [2020-10-28 19:09:22,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:22,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327389979] [2020-10-28 19:09:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:25,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:09:27,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:09:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 19:09:27,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:27,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:27,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:09:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:09:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:09:28,237 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:28,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:28,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:28,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:28,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:09:28,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:28,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:28,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:28,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:28,320 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 19:09:28,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327389979] [2020-10-28 19:09:28,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:28,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383919097] [2020-10-28 19:09:28,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:28,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:28,351 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-10-28 19:09:28,715 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:29,860 INFO L93 Difference]: Finished difference Result 389 states and 624 transitions. [2020-10-28 19:09:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:29,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 19:09:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:29,884 INFO L225 Difference]: With dead ends: 389 [2020-10-28 19:09:29,885 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 19:09:29,893 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 19:09:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 19:09:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-10-28 19:09:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 19:09:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 381 transitions. [2020-10-28 19:09:30,003 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 381 transitions. Word has length 78 [2020-10-28 19:09:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:30,004 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 381 transitions. [2020-10-28 19:09:30,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 381 transitions. [2020-10-28 19:09:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:09:30,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:30,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:30,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:09:30,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1009783361, now seen corresponding path program 1 times [2020-10-28 19:09:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533315998] [2020-10-28 19:09:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:30,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:34,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:34,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:09:34,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4789 [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:09:34,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:35,266 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:35,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:35,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:35,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:35,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 19:09:35,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:35,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:35,368 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 19:09:35,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533315998] [2020-10-28 19:09:35,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:35,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857346673] [2020-10-28 19:09:35,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:35,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:35,377 INFO L87 Difference]: Start difference. First operand 257 states and 381 transitions. Second operand 4 states. [2020-10-28 19:09:35,914 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:36,752 INFO L93 Difference]: Finished difference Result 643 states and 995 transitions. [2020-10-28 19:09:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:36,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:09:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:36,758 INFO L225 Difference]: With dead ends: 643 [2020-10-28 19:09:36,758 INFO L226 Difference]: Without dead ends: 434 [2020-10-28 19:09:36,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-28 19:09:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2020-10-28 19:09:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-28 19:09:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 658 transitions. [2020-10-28 19:09:36,821 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 658 transitions. Word has length 79 [2020-10-28 19:09:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:36,823 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 658 transitions. [2020-10-28 19:09:36,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 658 transitions. [2020-10-28 19:09:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:09:36,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:36,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:36,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:09:36,828 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1117336739, now seen corresponding path program 1 times [2020-10-28 19:09:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:36,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169685909] [2020-10-28 19:09:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:36,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:39,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:39,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:09:39,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:09:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-10-28 19:09:39,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:09:39,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:39,672 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:39,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:39,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:39,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:39,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:39,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:09:39,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:39,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:39,726 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 19:09:39,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169685909] [2020-10-28 19:09:39,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:39,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:39,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714823083] [2020-10-28 19:09:39,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:39,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:39,732 INFO L87 Difference]: Start difference. First operand 431 states and 658 transitions. Second operand 4 states. [2020-10-28 19:09:40,099 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:40,996 INFO L93 Difference]: Finished difference Result 1133 states and 1774 transitions. [2020-10-28 19:09:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:40,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:09:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:41,005 INFO L225 Difference]: With dead ends: 1133 [2020-10-28 19:09:41,005 INFO L226 Difference]: Without dead ends: 750 [2020-10-28 19:09:41,011 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 19:09:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2020-10-28 19:09:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 747. [2020-10-28 19:09:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-10-28 19:09:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1158 transitions. [2020-10-28 19:09:41,065 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1158 transitions. Word has length 80 [2020-10-28 19:09:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:41,067 INFO L481 AbstractCegarLoop]: Abstraction has 747 states and 1158 transitions. [2020-10-28 19:09:41,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1158 transitions. [2020-10-28 19:09:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:09:41,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:41,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:41,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:09:41,079 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:41,080 INFO L82 PathProgramCache]: Analyzing trace with hash -990090762, now seen corresponding path program 1 times [2020-10-28 19:09:41,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:41,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432470759] [2020-10-28 19:09:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:42,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 19:09:42,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:09:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:09:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:42,636 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:42,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:42,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:42,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:42,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:42,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:09:42,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:42,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:42,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:42,687 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 19:09:42,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432470759] [2020-10-28 19:09:42,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:42,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:42,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043781898] [2020-10-28 19:09:42,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:42,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:42,692 INFO L87 Difference]: Start difference. First operand 747 states and 1158 transitions. Second operand 4 states. [2020-10-28 19:09:43,051 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:44,081 INFO L93 Difference]: Finished difference Result 2017 states and 3170 transitions. [2020-10-28 19:09:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:44,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 19:09:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:44,095 INFO L225 Difference]: With dead ends: 2017 [2020-10-28 19:09:44,095 INFO L226 Difference]: Without dead ends: 1318 [2020-10-28 19:09:44,098 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 19:09:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-10-28 19:09:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1315. [2020-10-28 19:09:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2020-10-28 19:09:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 2050 transitions. [2020-10-28 19:09:44,187 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 2050 transitions. Word has length 81 [2020-10-28 19:09:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:44,187 INFO L481 AbstractCegarLoop]: Abstraction has 1315 states and 2050 transitions. [2020-10-28 19:09:44,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 2050 transitions. [2020-10-28 19:09:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:09:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:44,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:44,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:09:44,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:44,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1880482340, now seen corresponding path program 1 times [2020-10-28 19:09:44,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:44,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318615086] [2020-10-28 19:09:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:44,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:44,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:09:44,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:44,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-28 19:09:44,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:44,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:44,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:44,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:09:44,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:09:44,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:45,334 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:45,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:45,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:45,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:45,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:45,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:09:45,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:45,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:45,402 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 19:09:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318615086] [2020-10-28 19:09:45,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:45,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163311356] [2020-10-28 19:09:45,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:45,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:45,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:45,407 INFO L87 Difference]: Start difference. First operand 1315 states and 2050 transitions. Second operand 4 states. [2020-10-28 19:09:45,763 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:46,834 INFO L93 Difference]: Finished difference Result 3593 states and 5638 transitions. [2020-10-28 19:09:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:46,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 19:09:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:46,848 INFO L225 Difference]: With dead ends: 3593 [2020-10-28 19:09:46,848 INFO L226 Difference]: Without dead ends: 2326 [2020-10-28 19:09:46,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2020-10-28 19:09:46,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2323. [2020-10-28 19:09:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2020-10-28 19:09:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3618 transitions. [2020-10-28 19:09:47,008 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3618 transitions. Word has length 82 [2020-10-28 19:09:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:47,010 INFO L481 AbstractCegarLoop]: Abstraction has 2323 states and 3618 transitions. [2020-10-28 19:09:47,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3618 transitions. [2020-10-28 19:09:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:09:47,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:47,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:47,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:09:47,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2032467969, now seen corresponding path program 1 times [2020-10-28 19:09:47,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:47,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901903103] [2020-10-28 19:09:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:47,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:48,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:48,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:09:48,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1927 [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:09:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 19:09:48,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:49,407 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:49,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:49,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:49,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:49,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:49,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:49,476 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 19:09:49,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901903103] [2020-10-28 19:09:49,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:49,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:09:49,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233964469] [2020-10-28 19:09:49,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:09:49,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:09:49,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:09:49,480 INFO L87 Difference]: Start difference. First operand 2323 states and 3618 transitions. Second operand 9 states. [2020-10-28 19:09:49,896 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 19:09:51,359 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:09:51,746 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 19:09:52,157 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 19:09:52,513 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:09:52,910 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:09:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:53,449 INFO L93 Difference]: Finished difference Result 18248 states and 28608 transitions. [2020-10-28 19:09:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:09:53,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-28 19:09:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:53,535 INFO L225 Difference]: With dead ends: 18248 [2020-10-28 19:09:53,536 INFO L226 Difference]: Without dead ends: 15973 [2020-10-28 19:09:53,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-28 19:09:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15973 states. [2020-10-28 19:09:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15973 to 4595. [2020-10-28 19:09:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4595 states. [2020-10-28 19:09:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7122 transitions. [2020-10-28 19:09:54,121 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7122 transitions. Word has length 83 [2020-10-28 19:09:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:54,121 INFO L481 AbstractCegarLoop]: Abstraction has 4595 states and 7122 transitions. [2020-10-28 19:09:54,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:09:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7122 transitions. [2020-10-28 19:09:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 19:09:54,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:54,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:54,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:09:54,124 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1992859333, now seen corresponding path program 1 times [2020-10-28 19:09:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:54,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669105086] [2020-10-28 19:09:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:55,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:55,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:09:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 19:09:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:09:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:55,474 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:55,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:55,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:55,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:55,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:09:55,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:55,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:55,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669105086] [2020-10-28 19:09:55,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:55,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:09:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129424909] [2020-10-28 19:09:55,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:09:55,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:09:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:55,521 INFO L87 Difference]: Start difference. First operand 4595 states and 7122 transitions. Second operand 5 states. [2020-10-28 19:09:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:57,215 INFO L93 Difference]: Finished difference Result 9270 states and 14324 transitions. [2020-10-28 19:09:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:09:57,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 19:09:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:57,278 INFO L225 Difference]: With dead ends: 9270 [2020-10-28 19:09:57,279 INFO L226 Difference]: Without dead ends: 9267 [2020-10-28 19:09:57,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:09:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2020-10-28 19:09:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 4723. [2020-10-28 19:09:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-10-28 19:09:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 7250 transitions. [2020-10-28 19:09:57,810 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 7250 transitions. Word has length 84 [2020-10-28 19:09:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:57,811 INFO L481 AbstractCegarLoop]: Abstraction has 4723 states and 7250 transitions. [2020-10-28 19:09:57,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:09:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 7250 transitions. [2020-10-28 19:09:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:09:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:57,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:57,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:09:57,813 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1351226766, now seen corresponding path program 1 times [2020-10-28 19:09:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:57,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82451762] [2020-10-28 19:09:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:57,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:58,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:58,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:09:58,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:09:58,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-28 19:09:58,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:58,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:09:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 19:09:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:59,095 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:09:59,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:59,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:59,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:59,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:59,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:59,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:09:59,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:59,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:59,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:09:59,149 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 19:09:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82451762] [2020-10-28 19:09:59,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:59,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257799419] [2020-10-28 19:09:59,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:59,154 INFO L87 Difference]: Start difference. First operand 4723 states and 7250 transitions. Second operand 4 states. [2020-10-28 19:09:59,512 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:01,014 INFO L93 Difference]: Finished difference Result 13625 states and 20886 transitions. [2020-10-28 19:10:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:01,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 19:10:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:01,039 INFO L225 Difference]: With dead ends: 13625 [2020-10-28 19:10:01,039 INFO L226 Difference]: Without dead ends: 8950 [2020-10-28 19:10:01,055 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 19:10:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2020-10-28 19:10:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 8883. [2020-10-28 19:10:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-28 19:10:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13490 transitions. [2020-10-28 19:10:01,822 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13490 transitions. Word has length 85 [2020-10-28 19:10:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:01,823 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 13490 transitions. [2020-10-28 19:10:01,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13490 transitions. [2020-10-28 19:10:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:10:01,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:01,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:01,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:10:01,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1094455746, now seen corresponding path program 1 times [2020-10-28 19:10:01,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:01,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440911297] [2020-10-28 19:10:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:01,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:02,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:02,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:10:02,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:10:02,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 19:10:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:02,796 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:02,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:02,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:02,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:02,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:02,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:02,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:10:02,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:02,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:02,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:02,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:02,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:02,853 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 19:10:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440911297] [2020-10-28 19:10:02,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:02,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:10:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499839667] [2020-10-28 19:10:02,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:10:02,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:10:02,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:02,856 INFO L87 Difference]: Start difference. First operand 8883 states and 13490 transitions. Second operand 5 states. [2020-10-28 19:10:03,251 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:10:04,538 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:05,509 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:05,973 INFO L93 Difference]: Finished difference Result 18172 states and 27768 transitions. [2020-10-28 19:10:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:10:05,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-28 19:10:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:06,011 INFO L225 Difference]: With dead ends: 18172 [2020-10-28 19:10:06,012 INFO L226 Difference]: Without dead ends: 13497 [2020-10-28 19:10:06,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:10:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13497 states. [2020-10-28 19:10:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13497 to 13427. [2020-10-28 19:10:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13427 states. [2020-10-28 19:10:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13427 states to 13427 states and 20370 transitions. [2020-10-28 19:10:07,079 INFO L78 Accepts]: Start accepts. Automaton has 13427 states and 20370 transitions. Word has length 87 [2020-10-28 19:10:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:07,079 INFO L481 AbstractCegarLoop]: Abstraction has 13427 states and 20370 transitions. [2020-10-28 19:10:07,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:10:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 13427 states and 20370 transitions. [2020-10-28 19:10:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 19:10:07,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:07,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:07,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:10:07,082 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash 494924264, now seen corresponding path program 1 times [2020-10-28 19:10:07,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:07,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187463830] [2020-10-28 19:10:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:07,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:10,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:10,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 19:10:10,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:10:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-28 19:10:10,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:10,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:10:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:11,278 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:11,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:11,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:11,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:11,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:11,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:11,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:11,372 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 19:10:11,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187463830] [2020-10-28 19:10:11,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:11,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:11,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462467539] [2020-10-28 19:10:11,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:11,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:11,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:11,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:11,377 INFO L87 Difference]: Start difference. First operand 13427 states and 20370 transitions. Second operand 4 states. [2020-10-28 19:10:11,735 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:13,852 INFO L93 Difference]: Finished difference Result 29827 states and 45285 transitions. [2020-10-28 19:10:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:13,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 19:10:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:13,905 INFO L225 Difference]: With dead ends: 29827 [2020-10-28 19:10:13,905 INFO L226 Difference]: Without dead ends: 20984 [2020-10-28 19:10:13,928 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 19:10:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20984 states. [2020-10-28 19:10:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20984 to 20981. [2020-10-28 19:10:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20981 states. [2020-10-28 19:10:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20981 states to 20981 states and 31700 transitions. [2020-10-28 19:10:15,535 INFO L78 Accepts]: Start accepts. Automaton has 20981 states and 31700 transitions. Word has length 88 [2020-10-28 19:10:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:15,535 INFO L481 AbstractCegarLoop]: Abstraction has 20981 states and 31700 transitions. [2020-10-28 19:10:15,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20981 states and 31700 transitions. [2020-10-28 19:10:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:10:15,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:15,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:15,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:10:15,544 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -476745313, now seen corresponding path program 1 times [2020-10-28 19:10:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685366643] [2020-10-28 19:10:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:20,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:20,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 19:10:20,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:10:20,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:20,966 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:20,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:20,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:20,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:20,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:20,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:20,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685366643] [2020-10-28 19:10:21,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:21,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039340539] [2020-10-28 19:10:21,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:21,026 INFO L87 Difference]: Start difference. First operand 20981 states and 31700 transitions. Second operand 4 states. [2020-10-28 19:10:21,396 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:24,514 INFO L93 Difference]: Finished difference Result 61083 states and 92120 transitions. [2020-10-28 19:10:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:24,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:10:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:24,602 INFO L225 Difference]: With dead ends: 61083 [2020-10-28 19:10:24,602 INFO L226 Difference]: Without dead ends: 40152 [2020-10-28 19:10:24,652 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 19:10:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40152 states. [2020-10-28 19:10:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40152 to 40149. [2020-10-28 19:10:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40149 states. [2020-10-28 19:10:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40149 states to 40149 states and 60148 transitions. [2020-10-28 19:10:27,305 INFO L78 Accepts]: Start accepts. Automaton has 40149 states and 60148 transitions. Word has length 115 [2020-10-28 19:10:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:27,306 INFO L481 AbstractCegarLoop]: Abstraction has 40149 states and 60148 transitions. [2020-10-28 19:10:27,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 40149 states and 60148 transitions. [2020-10-28 19:10:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:10:27,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:27,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:27,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:10:27,321 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1683743200, now seen corresponding path program 1 times [2020-10-28 19:10:27,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:27,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46354103] [2020-10-28 19:10:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:32,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:32,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:10:32,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:10:32,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:10:32,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:32,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 19:10:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:10:32,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:32,763 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:32,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:32,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:32,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:32,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46354103] [2020-10-28 19:10:32,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:32,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:32,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892001830] [2020-10-28 19:10:32,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:32,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:32,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:32,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:32,805 INFO L87 Difference]: Start difference. First operand 40149 states and 60148 transitions. Second operand 4 states. [2020-10-28 19:10:34,752 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:10:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:35,575 INFO L93 Difference]: Finished difference Result 67831 states and 101625 transitions. [2020-10-28 19:10:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:35,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 19:10:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:35,628 INFO L225 Difference]: With dead ends: 67831 [2020-10-28 19:10:35,629 INFO L226 Difference]: Without dead ends: 27732 [2020-10-28 19:10:35,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27732 states. [2020-10-28 19:10:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27732 to 27729. [2020-10-28 19:10:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27729 states. [2020-10-28 19:10:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27729 states to 27729 states and 41267 transitions. [2020-10-28 19:10:37,572 INFO L78 Accepts]: Start accepts. Automaton has 27729 states and 41267 transitions. Word has length 115 [2020-10-28 19:10:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:37,572 INFO L481 AbstractCegarLoop]: Abstraction has 27729 states and 41267 transitions. [2020-10-28 19:10:37,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27729 states and 41267 transitions. [2020-10-28 19:10:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:10:37,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:37,581 INFO L422 BasicCegarLoop]: trace histogram [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, 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 19:10:37,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:10:37,581 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash -908472336, now seen corresponding path program 1 times [2020-10-28 19:10:37,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:37,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864911639] [2020-10-28 19:10:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:37,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:38,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:42,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:42,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:10:42,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:42,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:10:42,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:42,984 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:42,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:42,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:42,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:42,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:43,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864911639] [2020-10-28 19:10:43,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:43,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:43,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935727310] [2020-10-28 19:10:43,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:43,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:43,021 INFO L87 Difference]: Start difference. First operand 27729 states and 41267 transitions. Second operand 4 states. [2020-10-28 19:10:43,395 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:10:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:47,196 INFO L93 Difference]: Finished difference Result 79571 states and 117993 transitions. [2020-10-28 19:10:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:47,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:10:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:47,254 INFO L225 Difference]: With dead ends: 79571 [2020-10-28 19:10:47,254 INFO L226 Difference]: Without dead ends: 52848 [2020-10-28 19:10:47,279 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 19:10:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52848 states. [2020-10-28 19:10:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52848 to 52845. [2020-10-28 19:10:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52845 states. [2020-10-28 19:10:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52845 states to 52845 states and 77861 transitions. [2020-10-28 19:10:50,771 INFO L78 Accepts]: Start accepts. Automaton has 52845 states and 77861 transitions. Word has length 117 [2020-10-28 19:10:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:50,771 INFO L481 AbstractCegarLoop]: Abstraction has 52845 states and 77861 transitions. [2020-10-28 19:10:50,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 52845 states and 77861 transitions. [2020-10-28 19:10:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:10:50,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:50,783 INFO L422 BasicCegarLoop]: trace histogram [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, 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 19:10:50,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:10:50,784 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1179486087, now seen corresponding path program 1 times [2020-10-28 19:10:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525410055] [2020-10-28 19:10:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:50,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:55,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:55,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:10:55,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:55,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:10:55,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:55,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:55,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 19:10:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:10:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:56,222 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:10:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:56,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:56,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:56,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:56,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:10:56,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:56,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:10:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:56,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525410055] [2020-10-28 19:10:56,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:56,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:56,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917626855] [2020-10-28 19:10:56,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:56,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:56,277 INFO L87 Difference]: Start difference. First operand 52845 states and 77861 transitions. Second operand 4 states. [2020-10-28 19:10:56,653 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:11:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:03,238 INFO L93 Difference]: Finished difference Result 149399 states and 218817 transitions. [2020-10-28 19:11:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:03,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:11:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:03,362 INFO L225 Difference]: With dead ends: 149399 [2020-10-28 19:11:03,362 INFO L226 Difference]: Without dead ends: 99860 [2020-10-28 19:11:03,405 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 19:11:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99860 states. [2020-10-28 19:11:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99860 to 99857. [2020-10-28 19:11:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99857 states. [2020-10-28 19:11:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99857 states to 99857 states and 145213 transitions. [2020-10-28 19:11:10,192 INFO L78 Accepts]: Start accepts. Automaton has 99857 states and 145213 transitions. Word has length 117 [2020-10-28 19:11:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:10,192 INFO L481 AbstractCegarLoop]: Abstraction has 99857 states and 145213 transitions. [2020-10-28 19:11:10,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 99857 states and 145213 transitions. [2020-10-28 19:11:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:11:10,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:10,207 INFO L422 BasicCegarLoop]: trace histogram [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, 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 19:11:10,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:11:10,207 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:10,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1973831023, now seen corresponding path program 1 times [2020-10-28 19:11:10,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:10,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436424263] [2020-10-28 19:11:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:10,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:11,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:15,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:15,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:15,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:11:15,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:11:15,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:15,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 19:11:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:11:15,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:15,620 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:15,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:15,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:15,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:15,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:15,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436424263] [2020-10-28 19:11:15,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:15,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:15,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109127843] [2020-10-28 19:11:15,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:15,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:15,662 INFO L87 Difference]: Start difference. First operand 99857 states and 145213 transitions. Second operand 4 states. [2020-10-28 19:11:16,054 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:11:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:28,837 INFO L93 Difference]: Finished difference Result 288557 states and 417763 transitions. [2020-10-28 19:11:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:11:28,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:11:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:29,364 INFO L225 Difference]: With dead ends: 288557 [2020-10-28 19:11:29,364 INFO L226 Difference]: Without dead ends: 190442 [2020-10-28 19:11:29,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:11:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190442 states. [2020-10-28 19:11:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190442 to 190439. [2020-10-28 19:11:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190439 states. [2020-10-28 19:11:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190439 states to 190439 states and 273631 transitions. [2020-10-28 19:11:42,963 INFO L78 Accepts]: Start accepts. Automaton has 190439 states and 273631 transitions. Word has length 117 [2020-10-28 19:11:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:42,964 INFO L481 AbstractCegarLoop]: Abstraction has 190439 states and 273631 transitions. [2020-10-28 19:11:42,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:11:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 190439 states and 273631 transitions. [2020-10-28 19:11:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 19:11:42,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:42,985 INFO L422 BasicCegarLoop]: trace histogram [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, 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 19:11:42,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:11:42,989 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -371215868, now seen corresponding path program 1 times [2020-10-28 19:11:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:42,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672869741] [2020-10-28 19:11:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:43,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:48,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 19:11:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 19:11:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:48,403 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:11:48,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:48,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:11:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:48,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672869741] [2020-10-28 19:11:48,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:48,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:11:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246066514] [2020-10-28 19:11:48,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:11:48,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:11:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:11:48,450 INFO L87 Difference]: Start difference. First operand 190439 states and 273631 transitions. Second operand 4 states. [2020-10-28 19:11:48,825 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:12:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:12:12,787 INFO L93 Difference]: Finished difference Result 552051 states and 789581 transitions. [2020-10-28 19:12:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:12:12,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 19:12:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:12:13,711 INFO L225 Difference]: With dead ends: 552051 [2020-10-28 19:12:13,712 INFO L226 Difference]: Without dead ends: 363184 [2020-10-28 19:12:13,906 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 19:12:14,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363184 states.