/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:43:28,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:43:28,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:43:28,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:43:28,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:43:28,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:43:28,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:43:28,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:43:28,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:43:28,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:43:28,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:43:28,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:43:28,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:43:28,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:43:28,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:43:28,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:43:28,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:43:28,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:43:28,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:43:28,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:43:28,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:43:28,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:43:28,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:43:28,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:43:28,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:43:28,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:43:28,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:43:28,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:43:28,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:43:28,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:43:28,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:43:28,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:43:28,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:43:28,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:43:28,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:43:28,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:43:28,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:43:28,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:43:28,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:43:28,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:43:28,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:43:28,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:43:29,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:43:29,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:43:29,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:43:29,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:43:29,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:43:29,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:43:29,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:43:29,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:43:29,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:43:29,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:43:29,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:43:29,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:43:29,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:43:29,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:43:29,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:43:29,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:43:29,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:43:29,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:43:29,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:43:29,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:43:29,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:43:29,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:43:29,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:43:29,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:43:29,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:43:29,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:43:29,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:43:29,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:43:29,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:43:29,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:43:29,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:43:29,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:43:29,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:43:29,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:43:29,534 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:43:29,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label20.c [2020-10-28 10:43:29,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38af73243/4278c0154bfa4ff98b6b810646e6d7ef/FLAGb952896b8 [2020-10-28 10:43:30,682 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:43:30,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label20.c [2020-10-28 10:43:30,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38af73243/4278c0154bfa4ff98b6b810646e6d7ef/FLAGb952896b8 [2020-10-28 10:43:31,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38af73243/4278c0154bfa4ff98b6b810646e6d7ef [2020-10-28 10:43:31,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:43:31,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:43:31,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:43:31,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:43:31,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:43:31,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:43:31" (1/1) ... [2020-10-28 10:43:31,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1098b93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:31, skipping insertion in model container [2020-10-28 10:43:31,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:43:31" (1/1) ... [2020-10-28 10:43:31,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:43:31,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:43:33,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:43:33,783 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:43:35,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:43:35,119 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:43:35,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35 WrapperNode [2020-10-28 10:43:35,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:43:35,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:43:35,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:43:35,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:43:35,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... [2020-10-28 10:43:35,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:43:35,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:43:35,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:43:35,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:43:35,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:43:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:43:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:43:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:43:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:43:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-28 10:43:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-28 10:43:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:43:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:43:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:43:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:43:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:43:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:43:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:43:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:43:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:43:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:43:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:43:45,328 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:43:45,328 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:43:45,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:43:45 BoogieIcfgContainer [2020-10-28 10:43:45,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:43:45,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:43:45,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:43:45,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:43:45,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:43:31" (1/3) ... [2020-10-28 10:43:45,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cdc8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:43:45, skipping insertion in model container [2020-10-28 10:43:45,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:43:35" (2/3) ... [2020-10-28 10:43:45,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cdc8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:43:45, skipping insertion in model container [2020-10-28 10:43:45,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:43:45" (3/3) ... [2020-10-28 10:43:45,343 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label20.c [2020-10-28 10:43:45,357 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:43:45,365 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:43:45,380 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:43:45,425 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:43:45,425 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:43:45,425 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:43:45,425 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:43:45,425 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:43:45,426 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:43:45,426 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:43:45,426 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:43:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-28 10:43:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1706 [2020-10-28 10:43:45,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:43:45,651 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:43:45,652 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:43:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:43:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1920977959, now seen corresponding path program 1 times [2020-10-28 10:43:45,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:43:45,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300631203] [2020-10-28 10:43:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:43:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:52,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:52,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1729 [2020-10-28 10:43:52,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:43:52,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-28 10:43:52,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:52,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 10:43:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:43:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1720 [2020-10-28 10:43:52,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:43:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:43:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:54,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:54,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:43:54,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:43:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:43:54,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:54,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:43:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:43:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:43:54,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:43:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:43:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300631203] [2020-10-28 10:43:57,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:43:57,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 10:43:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342593610] [2020-10-28 10:43:57,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:43:57,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:43:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:43:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:43:57,052 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 5 states. [2020-10-28 10:44:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:44:22,414 INFO L93 Difference]: Finished difference Result 6315 states and 11856 transitions. [2020-10-28 10:44:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:44:22,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1705 [2020-10-28 10:44:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:44:22,475 INFO L225 Difference]: With dead ends: 6315 [2020-10-28 10:44:22,475 INFO L226 Difference]: Without dead ends: 4025 [2020-10-28 10:44:22,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:44:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2020-10-28 10:44:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3998. [2020-10-28 10:44:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2020-10-28 10:44:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6428 transitions. [2020-10-28 10:44:22,761 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6428 transitions. Word has length 1705 [2020-10-28 10:44:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:44:22,768 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 6428 transitions. [2020-10-28 10:44:22,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:44:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6428 transitions. [2020-10-28 10:44:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1715 [2020-10-28 10:44:22,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:44:22,919 INFO L422 BasicCegarLoop]: trace histogram [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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:44:22,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:44:22,921 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:44:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:44:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1400465757, now seen corresponding path program 1 times [2020-10-28 10:44:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:44:22,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942827719] [2020-10-28 10:44:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:44:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1740 [2020-10-28 10:44:28,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:44:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5242 [2020-10-28 10:44:28,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:28,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:44:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:44:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:44:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:44:28,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:44:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:28,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:28,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:44:28,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:44:28,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:44:28,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:28,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:44:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:44:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:44:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:44:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:44:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:28,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:28,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:44:28,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:44:28,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:44:28,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:28,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:44:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:44:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:44:28,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:44:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:44:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942827719] [2020-10-28 10:44:30,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:44:30,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:44:30,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268445182] [2020-10-28 10:44:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:44:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:44:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:44:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:44:30,142 INFO L87 Difference]: Start difference. First operand 3998 states and 6428 transitions. Second operand 7 states. [2020-10-28 10:45:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:45:02,223 INFO L93 Difference]: Finished difference Result 11930 states and 19289 transitions. [2020-10-28 10:45:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:45:02,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1714 [2020-10-28 10:45:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:45:02,276 INFO L225 Difference]: With dead ends: 11930 [2020-10-28 10:45:02,277 INFO L226 Difference]: Without dead ends: 7938 [2020-10-28 10:45:02,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:45:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2020-10-28 10:45:02,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 7745. [2020-10-28 10:45:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7745 states. [2020-10-28 10:45:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 11188 transitions. [2020-10-28 10:45:02,567 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 11188 transitions. Word has length 1714 [2020-10-28 10:45:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:45:02,568 INFO L481 AbstractCegarLoop]: Abstraction has 7745 states and 11188 transitions. [2020-10-28 10:45:02,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:45:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 11188 transitions. [2020-10-28 10:45:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1717 [2020-10-28 10:45:02,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:45:02,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:45:02,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:45:02,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:45:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:45:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1530063391, now seen corresponding path program 1 times [2020-10-28 10:45:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:45:02,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597889588] [2020-10-28 10:45:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:45:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:04,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:08,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:08,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1742 [2020-10-28 10:45:08,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:45:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 10:45:08,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:08,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:08,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:45:08,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:45:08,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:45:08,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:45:08,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:45:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:08,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:08,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:45:08,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:45:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:45:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:45:08,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:45:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:08,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:08,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:08,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:45:08,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:45:08,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:45:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:45:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:45:09,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597889588] [2020-10-28 10:45:09,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:45:09,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:45:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359804140] [2020-10-28 10:45:09,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:45:09,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:45:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:45:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:45:09,901 INFO L87 Difference]: Start difference. First operand 7745 states and 11188 transitions. Second operand 7 states. [2020-10-28 10:45:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:45:42,621 INFO L93 Difference]: Finished difference Result 23341 states and 34377 transitions. [2020-10-28 10:45:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:45:42,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1716 [2020-10-28 10:45:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:45:42,709 INFO L225 Difference]: With dead ends: 23341 [2020-10-28 10:45:42,712 INFO L226 Difference]: Without dead ends: 15602 [2020-10-28 10:45:42,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:45:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2020-10-28 10:45:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 15280. [2020-10-28 10:45:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15280 states. [2020-10-28 10:45:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15280 states to 15280 states and 19812 transitions. [2020-10-28 10:45:43,126 INFO L78 Accepts]: Start accepts. Automaton has 15280 states and 19812 transitions. Word has length 1716 [2020-10-28 10:45:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:45:43,128 INFO L481 AbstractCegarLoop]: Abstraction has 15280 states and 19812 transitions. [2020-10-28 10:45:43,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:45:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 15280 states and 19812 transitions. [2020-10-28 10:45:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1728 [2020-10-28 10:45:43,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:45:43,206 INFO L422 BasicCegarLoop]: trace histogram [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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:45:43,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:45:43,206 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:45:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:45:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash -678422920, now seen corresponding path program 1 times [2020-10-28 10:45:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:45:43,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816383688] [2020-10-28 10:45:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:45:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:43,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:48,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:48,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1753 [2020-10-28 10:45:48,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:45:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5234 [2020-10-28 10:45:48,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:48,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:45:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:45:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 10:45:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:45:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:45:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:49,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:49,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:45:49,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:45:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:45:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:45:49,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:45:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:45:49,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:45:49,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:45:49,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 10:45:49,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:45:49,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:45:49,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:45:49,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:45:49,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:45:49,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:45:49,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 10:45:49,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:45:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:45:51,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816383688] [2020-10-28 10:45:51,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:45:51,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:45:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073421130] [2020-10-28 10:45:51,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:45:51,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:45:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:45:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:45:51,084 INFO L87 Difference]: Start difference. First operand 15280 states and 19812 transitions. Second operand 7 states. [2020-10-28 10:46:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:46:21,984 INFO L93 Difference]: Finished difference Result 39418 states and 52727 transitions. [2020-10-28 10:46:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:46:21,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1727 [2020-10-28 10:46:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:46:22,087 INFO L225 Difference]: With dead ends: 39418 [2020-10-28 10:46:22,087 INFO L226 Difference]: Without dead ends: 24144 [2020-10-28 10:46:22,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:46:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24144 states. [2020-10-28 10:46:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24144 to 23134. [2020-10-28 10:46:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23134 states. [2020-10-28 10:46:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 28689 transitions. [2020-10-28 10:46:22,888 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 28689 transitions. Word has length 1727 [2020-10-28 10:46:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:46:22,889 INFO L481 AbstractCegarLoop]: Abstraction has 23134 states and 28689 transitions. [2020-10-28 10:46:22,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:46:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 28689 transitions. [2020-10-28 10:46:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1841 [2020-10-28 10:46:22,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:46:22,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:46:22,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:46:22,975 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:46:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:46:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1110755826, now seen corresponding path program 1 times [2020-10-28 10:46:22,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:46:22,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171855519] [2020-10-28 10:46:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:46:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:23,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:24,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:28,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:28,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1868 [2020-10-28 10:46:28,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 10:46:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:46:28,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:46:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:28,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:46:28,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:46:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:46:28,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:46:28,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:46:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:29,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:29,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:46:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:46:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 10:46:29,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:46:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-28 10:46:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:46:29,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:46:29,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:46:29,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 10:46:29,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:46:29,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:46:29,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:46:29,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:46:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:46:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:46:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 10:46:29,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:46:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:46:30,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171855519] [2020-10-28 10:46:30,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:46:30,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:46:30,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310340893] [2020-10-28 10:46:30,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:46:30,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:46:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:46:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:46:30,823 INFO L87 Difference]: Start difference. First operand 23134 states and 28689 transitions. Second operand 8 states.