/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=SHALLOWEST --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/eca-rers2012/Problem06_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:35:47,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:35:47,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:35:47,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:35:47,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:35:47,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:35:47,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:35:47,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:35:47,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:35:47,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:35:47,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:35:47,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:35:47,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:35:47,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:35:47,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:35:47,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:35:47,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:35:47,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:35:47,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:35:47,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:35:47,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:35:47,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:35:47,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:35:47,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:35:47,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:35:47,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:35:47,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:35:47,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:35:47,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:35:47,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:35:47,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:35:47,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:35:47,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:35:47,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:35:47,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:35:47,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:35:47,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:35:47,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:35:47,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:35:47,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:35:47,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:35:47,946 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 [2020-10-26 21:35:47,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:35:47,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:35:47,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:35:47,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:35:47,996 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:35:47,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:35:47,996 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:35:47,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:35:47,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:35:47,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:35:47,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:35:47,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:35:47,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:35:47,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:35:47,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:35:47,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:35:47,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:35:47,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:35:47,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:35:48,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:35:48,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:35:48,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:35:48,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:35:48,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:35:48,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:35:48,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:35:48,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:35:48,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:35:48,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:35:48,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:35:48,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:35:48,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:35:48,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:35:48,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:35:48,401 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:35:48,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label36.c [2020-10-26 21:35:48,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73298c3a7/9ca954eacc134393bc1debff1e15a244/FLAG53769dcbe [2020-10-26 21:35:49,755 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:35:49,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label36.c [2020-10-26 21:35:49,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73298c3a7/9ca954eacc134393bc1debff1e15a244/FLAG53769dcbe [2020-10-26 21:35:50,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73298c3a7/9ca954eacc134393bc1debff1e15a244 [2020-10-26 21:35:50,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:35:50,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:35:50,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:35:50,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:35:50,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:35:50,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:35:50" (1/1) ... [2020-10-26 21:35:50,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ed5188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:50, skipping insertion in model container [2020-10-26 21:35:50,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:35:50" (1/1) ... [2020-10-26 21:35:50,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:35:50,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:35:52,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:35:52,296 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:35:53,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:35:53,403 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:35:53,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53 WrapperNode [2020-10-26 21:35:53,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:35:53,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:35:53,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:35:53,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:35:53,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:53,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... [2020-10-26 21:35:54,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:35:54,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:35:54,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:35:54,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:35:54,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:35:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:35:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:35:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:35:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:35:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:35:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:35:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:35:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:35:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:35:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:35:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:35:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:35:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:35:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:35:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:35:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:35:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:35:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:35:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:35:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:35:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:36:01,755 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:36:01,755 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:36:01,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:01 BoogieIcfgContainer [2020-10-26 21:36:01,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:36:01,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:36:01,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:36:01,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:36:01,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:35:50" (1/3) ... [2020-10-26 21:36:01,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d47328c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:01, skipping insertion in model container [2020-10-26 21:36:01,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:35:53" (2/3) ... [2020-10-26 21:36:01,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d47328c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:01, skipping insertion in model container [2020-10-26 21:36:01,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:01" (3/3) ... [2020-10-26 21:36:01,772 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label36.c [2020-10-26 21:36:01,784 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:36:01,790 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:36:01,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:36:01,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:36:01,856 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:36:01,856 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:36:01,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:36:01,856 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:36:01,856 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:36:01,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:36:01,857 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:36:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:36:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-10-26 21:36:01,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:36:01,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:36:01,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:36:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:36:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 91841440, now seen corresponding path program 1 times [2020-10-26 21:36:02,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:36:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616686551] [2020-10-26 21:36:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:36:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:08,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:08,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 968 [2020-10-26 21:36:08,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:36:08,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 21:36:08,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:36:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:36:08,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:36:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:36:11,861 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,123 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,408 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:12,649 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 21:36:12,896 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:13,142 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:13,402 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:13,627 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:13,851 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:14,049 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:14,198 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:36:14,353 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:36:14,504 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 21:36:14,893 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:36:14,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:36:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:14,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:14,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:36:14,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:36:14,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 21:36:14,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:36:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:36:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:36:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:36:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:36:26,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616686551] [2020-10-26 21:36:26,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:36:26,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:36:26,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387193325] [2020-10-26 21:36:26,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:36:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:36:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:36:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:36:26,073 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:36:26,625 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-26 21:36:27,662 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 197 [2020-10-26 21:36:28,661 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 197 [2020-10-26 21:36:29,759 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 218 DAG size of output: 205 [2020-10-26 21:36:34,216 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 216 DAG size of output: 204 [2020-10-26 21:36:38,188 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 219 DAG size of output: 203 [2020-10-26 21:36:41,038 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 194 [2020-10-26 21:36:42,114 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 200 [2020-10-26 21:36:43,425 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 199 [2020-10-26 21:36:53,569 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 192 [2020-10-26 21:36:54,625 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 197 [2020-10-26 21:36:57,967 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 196 [2020-10-26 21:37:05,940 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 190 [2020-10-26 21:37:07,007 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 194 [2020-10-26 21:37:09,793 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 192 [2020-10-26 21:37:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:37:22,839 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:37:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:37:22,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 950 [2020-10-26 21:37:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:37:22,912 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:37:22,913 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:37:22,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:37:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:37:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:37:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:37:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:37:23,113 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 950 [2020-10-26 21:37:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:37:23,116 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:37:23,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:37:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:37:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2020-10-26 21:37:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:37:23,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:37:23,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:37:23,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:37:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:37:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash -718803287, now seen corresponding path program 1 times [2020-10-26 21:37:23,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:37:23,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583232725] [2020-10-26 21:37:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:37:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:28,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:28,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1040 [2020-10-26 21:37:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:37:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:29,256 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:37:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:37:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:29,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:29,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:37:29,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 21:37:29,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:37:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:37:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:37:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:37:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:37:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:29,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:29,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:29,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:37:29,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 21:37:29,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:37:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:37:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:37:29,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:37:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:37:30,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583232725] [2020-10-26 21:37:30,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:37:30,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:37:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539526837] [2020-10-26 21:37:30,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:37:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:37:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:37:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:37:30,418 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:37:30,703 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:37:32,131 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 21:37:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:37:54,501 INFO L93 Difference]: Finished difference Result 4492 states and 7531 transitions. [2020-10-26 21:37:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:37:54,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1020 [2020-10-26 21:37:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:37:54,520 INFO L225 Difference]: With dead ends: 4492 [2020-10-26 21:37:54,521 INFO L226 Difference]: Without dead ends: 3232 [2020-10-26 21:37:54,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:37:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2020-10-26 21:37:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3164. [2020-10-26 21:37:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3164 states. [2020-10-26 21:37:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4675 transitions. [2020-10-26 21:37:54,627 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4675 transitions. Word has length 1020 [2020-10-26 21:37:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:37:54,627 INFO L481 AbstractCegarLoop]: Abstraction has 3164 states and 4675 transitions. [2020-10-26 21:37:54,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:37:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4675 transitions. [2020-10-26 21:37:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2020-10-26 21:37:54,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:37:54,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:37:54,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:37:54,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:37:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:37:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1745852012, now seen corresponding path program 1 times [2020-10-26 21:37:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:37:54,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219349197] [2020-10-26 21:37:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:37:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:55,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1092 [2020-10-26 21:38:00,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-26 21:38:00,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 21:38:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1083 [2020-10-26 21:38:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:01,128 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:01,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:01,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:01,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:01,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:01,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:01,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:01,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:01,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-26 21:38:01,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:38:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219349197] [2020-10-26 21:38:02,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:02,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:38:02,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296378617] [2020-10-26 21:38:02,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:38:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:02,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:38:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:38:02,871 INFO L87 Difference]: Start difference. First operand 3164 states and 4675 transitions. Second operand 6 states. [2020-10-26 21:38:03,144 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:38:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:21,875 INFO L93 Difference]: Finished difference Result 7861 states and 12346 transitions. [2020-10-26 21:38:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:38:21,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1072 [2020-10-26 21:38:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:21,912 INFO L225 Difference]: With dead ends: 7861 [2020-10-26 21:38:21,913 INFO L226 Difference]: Without dead ends: 5457 [2020-10-26 21:38:21,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:38:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2020-10-26 21:38:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 5414. [2020-10-26 21:38:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5414 states. [2020-10-26 21:38:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5414 states to 5414 states and 7834 transitions. [2020-10-26 21:38:22,087 INFO L78 Accepts]: Start accepts. Automaton has 5414 states and 7834 transitions. Word has length 1072 [2020-10-26 21:38:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:22,090 INFO L481 AbstractCegarLoop]: Abstraction has 5414 states and 7834 transitions. [2020-10-26 21:38:22,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:38:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5414 states and 7834 transitions. [2020-10-26 21:38:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2020-10-26 21:38:22,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:22,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:22,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:38:22,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash 415307109, now seen corresponding path program 1 times [2020-10-26 21:38:22,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:22,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222035727] [2020-10-26 21:38:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:27,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:27,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1106 [2020-10-26 21:38:27,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:38:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-26 21:38:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:38:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 21:38:27,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:38:27,867 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:27,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:27,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:27,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:27,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:38:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:28,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:28,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:38:28,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:28,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 21:38:28,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:38:28,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 21:38:29,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222035727] [2020-10-26 21:38:29,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:29,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:38:29,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114950170] [2020-10-26 21:38:29,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:38:29,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:38:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:38:29,384 INFO L87 Difference]: Start difference. First operand 5414 states and 7834 transitions. Second operand 7 states. [2020-10-26 21:38:29,645 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:38:31,334 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:38:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:50,857 INFO L93 Difference]: Finished difference Result 14980 states and 22635 transitions. [2020-10-26 21:38:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:38:50,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1084 [2020-10-26 21:38:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:50,905 INFO L225 Difference]: With dead ends: 14980 [2020-10-26 21:38:50,906 INFO L226 Difference]: Without dead ends: 10326 [2020-10-26 21:38:50,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:38:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10326 states. [2020-10-26 21:38:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10326 to 10035. [2020-10-26 21:38:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10035 states. [2020-10-26 21:38:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 13986 transitions. [2020-10-26 21:38:51,219 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 13986 transitions. Word has length 1084 [2020-10-26 21:38:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:51,220 INFO L481 AbstractCegarLoop]: Abstraction has 10035 states and 13986 transitions. [2020-10-26 21:38:51,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:38:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 13986 transitions. [2020-10-26 21:38:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2020-10-26 21:38:51,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:51,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:51,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:38:51,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1668990109, now seen corresponding path program 1 times [2020-10-26 21:38:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:51,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917239106] [2020-10-26 21:38:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:52,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:54,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:56,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:56,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1110 [2020-10-26 21:38:56,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:38:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 21:38:56,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:38:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 21:38:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:56,902 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:56,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:56,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:56,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:57,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:38:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:57,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:57,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:57,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 21:38:57,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:38:57,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:38:58,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917239106] [2020-10-26 21:38:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:58,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:38:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116660339] [2020-10-26 21:38:58,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:38:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:38:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:38:58,878 INFO L87 Difference]: Start difference. First operand 10035 states and 13986 transitions. Second operand 8 states. [2020-10-26 21:38:59,158 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:39:00,218 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:39:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:39:21,997 INFO L93 Difference]: Finished difference Result 29460 states and 43236 transitions. [2020-10-26 21:39:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:39:21,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1088 [2020-10-26 21:39:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:39:22,080 INFO L225 Difference]: With dead ends: 29460 [2020-10-26 21:39:22,080 INFO L226 Difference]: Without dead ends: 20185 [2020-10-26 21:39:22,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:39:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20185 states. [2020-10-26 21:39:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20185 to 19620. [2020-10-26 21:39:22,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19620 states. [2020-10-26 21:39:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19620 states to 19620 states and 26980 transitions. [2020-10-26 21:39:22,680 INFO L78 Accepts]: Start accepts. Automaton has 19620 states and 26980 transitions. Word has length 1088 [2020-10-26 21:39:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:39:22,681 INFO L481 AbstractCegarLoop]: Abstraction has 19620 states and 26980 transitions. [2020-10-26 21:39:22,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:39:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19620 states and 26980 transitions. [2020-10-26 21:39:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2020-10-26 21:39:22,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:22,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:22,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:39:22,745 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:22,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1083000057, now seen corresponding path program 1 times [2020-10-26 21:39:22,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:22,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954730] [2020-10-26 21:39:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:23,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:23,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:23,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:28,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:28,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1128 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 21:39:28,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:28,430 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:39:28,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:39:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:28,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:28,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:39:28,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:28,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:39:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:28,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:28,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:39:28,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:28,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-26 21:39:28,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:39:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:39:28,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:39:28,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:29,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:39:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:29,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:29,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:29,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:39:29,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 21:39:29,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:29,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:39:29,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:39:29,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 21:39:29,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:29,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-10-26 21:39:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:29,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:29,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:39:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 150 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-26 21:39:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954730] [2020-10-26 21:39:30,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:39:30,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:39:30,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977311786] [2020-10-26 21:39:30,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:39:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:39:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:39:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:39:30,247 INFO L87 Difference]: Start difference. First operand 19620 states and 26980 transitions. Second operand 7 states. [2020-10-26 21:39:30,522 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 161