/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/Problem05_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:10:51,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:10:51,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:10:51,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:10:51,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:10:51,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:10:51,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:10:51,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:10:51,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:10:51,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:10:51,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:10:51,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:10:51,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:10:51,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:10:51,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:10:51,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:10:51,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:10:51,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:10:51,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:10:51,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:10:51,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:10:51,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:10:51,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:10:51,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:10:51,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:10:51,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:10:51,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:10:51,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:10:51,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:10:51,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:10:51,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:10:51,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:10:51,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:10:51,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:10:51,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:10:51,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:10:51,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:10:51,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:10:51,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:10:51,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:10:51,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:10:51,122 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 21:10:51,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:10:51,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:10:51,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:10:51,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:10:51,171 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:10:51,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:10:51,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:10:51,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:10:51,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:10:51,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:10:51,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:10:51,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:10:51,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:10:51,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:10:51,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:10:51,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:10:51,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:10:51,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:10:51,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:10:51,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:10:51,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:10:51,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:10:51,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:10:51,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:10:51,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:10:51,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:10:51,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:10:51,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:10:51,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:10:51,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:10:51,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:10:51,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:10:51,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:10:51,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:10:51,584 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:10:51,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label05.c [2020-10-26 21:10:51,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24cdcb8f6/2497424045d04cbb8e101b5ef55b58e7/FLAG8a32b7f17 [2020-10-26 21:10:53,072 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:10:53,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label05.c [2020-10-26 21:10:53,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24cdcb8f6/2497424045d04cbb8e101b5ef55b58e7/FLAG8a32b7f17 [2020-10-26 21:10:53,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24cdcb8f6/2497424045d04cbb8e101b5ef55b58e7 [2020-10-26 21:10:53,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:10:53,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:10:53,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:10:53,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:10:53,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:10:53,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:10:53" (1/1) ... [2020-10-26 21:10:53,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae72c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:53, skipping insertion in model container [2020-10-26 21:10:53,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:10:53" (1/1) ... [2020-10-26 21:10:53,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:10:53,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:10:55,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:10:55,636 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:10:56,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:10:57,012 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:10:57,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57 WrapperNode [2020-10-26 21:10:57,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:10:57,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:10:57,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:10:57,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:10:57,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (1/1) ... [2020-10-26 21:10:57,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:10:57,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:10:57,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:10:57,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:10:57,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (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 21:10:57,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:10:57,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:10:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:10:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:10:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:10:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:10:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:10:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:10:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-26 21:10:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-26 21:10:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-26 21:10:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:10:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:10:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:10:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:10:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:10:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:10:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:10:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:10:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:10:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:10:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:10:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:11:07,803 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:11:07,804 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:11:07,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:11:07 BoogieIcfgContainer [2020-10-26 21:11:07,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:11:07,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:11:07,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:11:07,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:11:07,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:10:53" (1/3) ... [2020-10-26 21:11:07,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1151ee13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:11:07, skipping insertion in model container [2020-10-26 21:11:07,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:10:57" (2/3) ... [2020-10-26 21:11:07,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1151ee13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:11:07, skipping insertion in model container [2020-10-26 21:11:07,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:11:07" (3/3) ... [2020-10-26 21:11:07,818 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label05.c [2020-10-26 21:11:07,830 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:11:07,837 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:11:07,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:11:07,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:11:07,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:11:07,889 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:11:07,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:11:07,889 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:11:07,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:11:07,889 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:11:07,889 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:11:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-26 21:11:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1709 [2020-10-26 21:11:08,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:11:08,164 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, 1, 1, 1] [2020-10-26 21:11:08,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:11:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:11:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -75663049, now seen corresponding path program 1 times [2020-10-26 21:11:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:11:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402535049] [2020-10-26 21:11:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:11:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:14,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:14,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1732 [2020-10-26 21:11:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-26 21:11:14,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 21:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1723 [2020-10-26 21:11:14,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:11:16,400 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 21:11:16,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:11:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:16,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:16,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:11:16,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 21:11:16,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:11:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:11:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:11:16,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:11:20,065 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 21:11:20,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402535049] [2020-10-26 21:11:20,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:11:20,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 21:11:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661950302] [2020-10-26 21:11:20,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 21:11:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:11:20,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 21:11:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:11:20,096 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 5 states. [2020-10-26 21:11:20,282 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 21:11:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:11:49,115 INFO L93 Difference]: Finished difference Result 8129 states and 15417 transitions. [2020-10-26 21:11:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:11:49,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1708 [2020-10-26 21:11:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:11:49,186 INFO L225 Difference]: With dead ends: 8129 [2020-10-26 21:11:49,186 INFO L226 Difference]: Without dead ends: 5835 [2020-10-26 21:11:49,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:11:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5835 states. [2020-10-26 21:11:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 5802. [2020-10-26 21:11:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5802 states. [2020-10-26 21:11:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5802 states to 5802 states and 9375 transitions. [2020-10-26 21:11:49,475 INFO L78 Accepts]: Start accepts. Automaton has 5802 states and 9375 transitions. Word has length 1708 [2020-10-26 21:11:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:11:49,480 INFO L481 AbstractCegarLoop]: Abstraction has 5802 states and 9375 transitions. [2020-10-26 21:11:49,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 21:11:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 5802 states and 9375 transitions. [2020-10-26 21:11:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1718 [2020-10-26 21:11:49,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:11:49,861 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] [2020-10-26 21:11:49,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:11:49,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:11:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:11:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1597515059, now seen corresponding path program 1 times [2020-10-26 21:11:49,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:11:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809586647] [2020-10-26 21:11:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:11:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:55,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:55,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1743 [2020-10-26 21:11:55,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:11:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-26 21:11:55,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:11:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:11:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 21:11:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:11:56,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:11:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:56,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:56,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:56,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:11:56,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:56,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:11:56,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:56,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:11:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:11:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:11:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:11:56,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:11:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:11:56,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:11:56,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:11:56,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 21:11:56,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:11:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:11:56,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:11:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:11:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:11:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 21:11:56,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:11:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:11:58,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809586647] [2020-10-26 21:11:58,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:11:58,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:11:58,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997774567] [2020-10-26 21:11:58,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:11:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:11:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:11:58,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:11:58,184 INFO L87 Difference]: Start difference. First operand 5802 states and 9375 transitions. Second operand 7 states. [2020-10-26 21:12:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:12:24,547 INFO L93 Difference]: Finished difference Result 17390 states and 28790 transitions. [2020-10-26 21:12:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:12:24,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1717 [2020-10-26 21:12:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:12:24,623 INFO L225 Difference]: With dead ends: 17390 [2020-10-26 21:12:24,623 INFO L226 Difference]: Without dead ends: 11594 [2020-10-26 21:12:24,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:12:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11594 states. [2020-10-26 21:12:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11594 to 11310. [2020-10-26 21:12:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11310 states. [2020-10-26 21:12:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 16550 transitions. [2020-10-26 21:12:25,004 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 16550 transitions. Word has length 1717 [2020-10-26 21:12:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:12:25,005 INFO L481 AbstractCegarLoop]: Abstraction has 11310 states and 16550 transitions. [2020-10-26 21:12:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:12:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 16550 transitions. [2020-10-26 21:12:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2020-10-26 21:12:25,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:12:25,114 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] [2020-10-26 21:12:25,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:12:25,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:12:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:12:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2003892783, now seen corresponding path program 1 times [2020-10-26 21:12:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:12:25,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119300497] [2020-10-26 21:12:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:12:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:30,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:30,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1745 [2020-10-26 21:12:30,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:12:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5192 [2020-10-26 21:12:30,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:12:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:12:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:12:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:31,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:12:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:31,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:12:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 21:12:31,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:12:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:12:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:12:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:31,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:12:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:12:31,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:12:31,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:12:31,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:12:31,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:12:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:12:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119300497] [2020-10-26 21:12:32,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:12:32,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:12:32,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044685194] [2020-10-26 21:12:32,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:12:32,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:12:32,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:12:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:12:32,839 INFO L87 Difference]: Start difference. First operand 11310 states and 16550 transitions. Second operand 7 states. [2020-10-26 21:12:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:12:58,347 INFO L93 Difference]: Finished difference Result 26776 states and 39022 transitions. [2020-10-26 21:12:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:12:58,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1719 [2020-10-26 21:12:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:12:58,428 INFO L225 Difference]: With dead ends: 26776 [2020-10-26 21:12:58,428 INFO L226 Difference]: Without dead ends: 15472 [2020-10-26 21:12:58,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:12:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15472 states. [2020-10-26 21:12:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15472 to 15371. [2020-10-26 21:12:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15371 states. [2020-10-26 21:12:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15371 states to 15371 states and 21679 transitions. [2020-10-26 21:12:58,982 INFO L78 Accepts]: Start accepts. Automaton has 15371 states and 21679 transitions. Word has length 1719 [2020-10-26 21:12:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:12:58,982 INFO L481 AbstractCegarLoop]: Abstraction has 15371 states and 21679 transitions. [2020-10-26 21:12:58,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:12:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 15371 states and 21679 transitions. [2020-10-26 21:12:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1731 [2020-10-26 21:12:59,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:12:59,084 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, 1, 1, 1] [2020-10-26 21:12:59,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:12:59,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:12:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:12:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1441620424, now seen corresponding path program 1 times [2020-10-26 21:12:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:12:59,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94197336] [2020-10-26 21:12:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:12:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:12:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:04,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1756 [2020-10-26 21:13:04,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:13:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-26 21:13:04,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:13:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:13:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 21:13:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:13:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:05,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:13:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:13:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:13:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:05,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:13:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:05,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:05,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:05,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 21:13:05,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:05,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 21:13:05,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:13:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:13:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 21:13:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:13:06,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94197336] [2020-10-26 21:13:06,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:13:06,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:13:06,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969079942] [2020-10-26 21:13:06,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:13:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:13:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:13:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:13:06,631 INFO L87 Difference]: Start difference. First operand 15371 states and 21679 transitions. Second operand 7 states. [2020-10-26 21:13:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:13:31,800 INFO L93 Difference]: Finished difference Result 39067 states and 55266 transitions. [2020-10-26 21:13:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:13:31,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1730 [2020-10-26 21:13:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:13:31,908 INFO L225 Difference]: With dead ends: 39067 [2020-10-26 21:13:31,909 INFO L226 Difference]: Without dead ends: 23702 [2020-10-26 21:13:31,947 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 [2020-10-26 21:13:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23702 states. [2020-10-26 21:13:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23702 to 23228. [2020-10-26 21:13:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23228 states. [2020-10-26 21:13:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23228 states to 23228 states and 31759 transitions. [2020-10-26 21:13:32,715 INFO L78 Accepts]: Start accepts. Automaton has 23228 states and 31759 transitions. Word has length 1730 [2020-10-26 21:13:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:13:32,716 INFO L481 AbstractCegarLoop]: Abstraction has 23228 states and 31759 transitions. [2020-10-26 21:13:32,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:13:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23228 states and 31759 transitions. [2020-10-26 21:13:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1746 [2020-10-26 21:13:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:13:32,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:32,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:13:32,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:13:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:13:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1191209971, now seen corresponding path program 1 times [2020-10-26 21:13:32,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:13:32,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239661316] [2020-10-26 21:13:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:13:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:38,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:38,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1771 [2020-10-26 21:13:38,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:13:38,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 21:13:38,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:13:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:13:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 21:13:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:13:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:38,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:38,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:13:38,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:13:38,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:38,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:13:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:13:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:13:38,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:13:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 21:13:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:13:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 21:13:38,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:13:38,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:13:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:13:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 21:13:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:13:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:13:39,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239661316] [2020-10-26 21:13:39,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:13:39,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:13:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853537492] [2020-10-26 21:13:39,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:13:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:13:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:13:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:13:39,912 INFO L87 Difference]: Start difference. First operand 23228 states and 31759 transitions. Second operand 7 states. [2020-10-26 21:14:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:14:11,091 INFO L93 Difference]: Finished difference Result 70301 states and 103419 transitions. [2020-10-26 21:14:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:14:11,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1745 [2020-10-26 21:14:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:14:11,380 INFO L225 Difference]: With dead ends: 70301 [2020-10-26 21:14:11,380 INFO L226 Difference]: Without dead ends: 47079 [2020-10-26 21:14:11,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:14:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47079 states. [2020-10-26 21:14:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47079 to 46255. [2020-10-26 21:14:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46255 states. [2020-10-26 21:14:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46255 states to 46255 states and 62922 transitions. [2020-10-26 21:14:12,726 INFO L78 Accepts]: Start accepts. Automaton has 46255 states and 62922 transitions. Word has length 1745 [2020-10-26 21:14:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:14:12,727 INFO L481 AbstractCegarLoop]: Abstraction has 46255 states and 62922 transitions. [2020-10-26 21:14:12,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:14:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46255 states and 62922 transitions. [2020-10-26 21:14:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1836 [2020-10-26 21:14:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:14:12,864 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:12,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:14:12,865 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:14:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:14:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 172135994, now seen corresponding path program 1 times [2020-10-26 21:14:12,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:14:12,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862044889] [2020-10-26 21:14:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:14:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:14:13,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:14:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:14:18,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:14:18,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1861 [2020-10-26 21:14:18,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:14:18,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 21:14:18,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:14:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 21:14:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:14:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1852 [2020-10-26 21:14:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:14:19,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:14:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:14:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:14:19,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:14:19,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:14:19,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:14:19,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:14:19,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:14:19,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:14:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:14:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:14:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:14:19,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:14:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:14:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:14:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:14:19,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:14:19,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 21:14:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:14:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 120 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:14:23,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862044889] [2020-10-26 21:14:23,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:14:23,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 21:14:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348182077] [2020-10-26 21:14:23,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:14:23,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:14:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:14:23,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:14:23,683 INFO L87 Difference]: Start difference. First operand 46255 states and 62922 transitions. Second operand 7 states.