/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/Problem12_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:52:19,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:52:19,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:52:19,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:52:19,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:52:19,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:52:19,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:52:19,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:52:19,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:52:19,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:52:19,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:52:19,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:52:19,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:52:19,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:52:19,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:52:19,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:52:19,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:52:19,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:52:19,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:52:19,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:52:19,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:52:19,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:52:19,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:52:19,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:52:19,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:52:19,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:52:19,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:52:19,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:52:19,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:52:19,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:52:19,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:52:19,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:52:19,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:52:19,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:52:19,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:52:19,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:52:19,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:52:19,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:52:19,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:52:19,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:52:19,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:52:19,170 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 22:52:19,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:52:19,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:52:19,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:52:19,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:52:19,198 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:52:19,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:52:19,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:52:19,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:52:19,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:52:19,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:52:19,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:52:19,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:52:19,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:52:19,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:52:19,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:52:19,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:52:19,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:52:19,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:52:19,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:52:19,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:52:19,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:52:19,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:52:19,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:52:19,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:52:19,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:52:19,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:52:19,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:52:19,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:52:19,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:52:19,581 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:52:19,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label22.c [2020-10-26 22:52:19,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf4419154/dd87cb6f62da428b9faca8ad79e3aed3/FLAGdf9db711f [2020-10-26 22:52:20,646 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:52:20,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label22.c [2020-10-26 22:52:20,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf4419154/dd87cb6f62da428b9faca8ad79e3aed3/FLAGdf9db711f [2020-10-26 22:52:21,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf4419154/dd87cb6f62da428b9faca8ad79e3aed3 [2020-10-26 22:52:21,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:52:21,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:52:21,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:52:21,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:52:21,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:52:21,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:52:21" (1/1) ... [2020-10-26 22:52:21,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d667cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:21, skipping insertion in model container [2020-10-26 22:52:21,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:52:21" (1/1) ... [2020-10-26 22:52:21,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:52:21,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:52:22,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:52:22,781 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:52:23,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:52:23,715 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:52:23,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23 WrapperNode [2020-10-26 22:52:23,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:52:23,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:52:23,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:52:23,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:52:23,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:23,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:23,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:23,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:23,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:23,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:24,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (1/1) ... [2020-10-26 22:52:24,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:52:24,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:52:24,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:52:24,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:52:24,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (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 22:52:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:52:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:52:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:52:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:52:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:52:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:52:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:52:24,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:52:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:52:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:52:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:52:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:52:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:52:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:52:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:52:24,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:52:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:52:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:52:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:52:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:52:29,594 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:52:29,597 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:52:29,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:52:29 BoogieIcfgContainer [2020-10-26 22:52:29,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:52:29,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:52:29,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:52:29,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:52:29,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:52:21" (1/3) ... [2020-10-26 22:52:29,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e214f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:52:29, skipping insertion in model container [2020-10-26 22:52:29,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:52:23" (2/3) ... [2020-10-26 22:52:29,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e214f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:52:29, skipping insertion in model container [2020-10-26 22:52:29,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:52:29" (3/3) ... [2020-10-26 22:52:29,618 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label22.c [2020-10-26 22:52:29,633 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:52:29,640 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:52:29,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:52:29,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:52:29,709 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:52:29,709 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:52:29,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:52:29,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:52:29,710 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:52:29,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:52:29,710 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:52:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:52:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 22:52:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:29,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:52:29,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -603732724, now seen corresponding path program 1 times [2020-10-26 22:52:29,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:29,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594084939] [2020-10-26 22:52:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:30,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:30,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:52:30,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:30,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-26 22:52:30,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:30,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:52:30,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:52:30,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 22:52:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:52:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:52:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:31,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:31,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:52:31,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:31,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:52:31,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:52:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:52:31,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:52:31,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:31,063 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 22:52:31,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594084939] [2020-10-26 22:52:31,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:52:31,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:52:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851723910] [2020-10-26 22:52:31,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:52:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:52:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:52:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:52:31,097 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-26 22:52:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:52:42,320 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:52:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:52:42,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-26 22:52:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:52:42,360 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:52:42,361 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:52:42,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:52:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:52:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:52:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:52:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-26 22:52:42,543 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 71 [2020-10-26 22:52:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:52:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-26 22:52:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:52:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-26 22:52:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 22:52:42,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:42,551 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, 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 22:52:42,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:52:42,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 860245997, now seen corresponding path program 1 times [2020-10-26 22:52:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:42,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720327208] [2020-10-26 22:52:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:42,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:43,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 22:52:43,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:52:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-26 22:52:43,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:52:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:52:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:52:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:52:44,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:52:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:44,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:52:44,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:44,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 22:52:44,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:44,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:52:44,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:52:44,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:52:44,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 22:52:44,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:52:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:44,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:44,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:52:44,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:52:44,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:52:44,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:52:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720327208] [2020-10-26 22:52:44,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:52:44,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:52:44,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668908065] [2020-10-26 22:52:44,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:52:44,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:52:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:52:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:52:44,372 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 6 states. [2020-10-26 22:52:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:52:56,223 INFO L93 Difference]: Finished difference Result 4692 states and 7653 transitions. [2020-10-26 22:52:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:52:56,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-10-26 22:52:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:52:56,248 INFO L225 Difference]: With dead ends: 4692 [2020-10-26 22:52:56,248 INFO L226 Difference]: Without dead ends: 3144 [2020-10-26 22:52:56,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:52:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2020-10-26 22:52:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3126. [2020-10-26 22:52:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3126 states. [2020-10-26 22:52:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 4444 transitions. [2020-10-26 22:52:56,347 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 4444 transitions. Word has length 146 [2020-10-26 22:52:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:52:56,348 INFO L481 AbstractCegarLoop]: Abstraction has 3126 states and 4444 transitions. [2020-10-26 22:52:56,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:52:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 4444 transitions. [2020-10-26 22:52:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-26 22:52:56,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:56,352 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, 1, 1, 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 22:52:56,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:52:56,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1221924363, now seen corresponding path program 1 times [2020-10-26 22:52:56,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:56,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313537830] [2020-10-26 22:52:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:57,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:57,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:57,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 22:52:57,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:52:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-26 22:52:57,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:52:57,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:52:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:57,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:57,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:52:57,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:57,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:52:57,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:57,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:52:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:52:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:52:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:57,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:52:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:57,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:58,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:52:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:52:58,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:52:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:52:58,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:52:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:52:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:52:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:52:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:52:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:52:58,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313537830] [2020-10-26 22:52:58,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:52:58,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:52:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526876506] [2020-10-26 22:52:58,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:52:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:52:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:52:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:52:58,095 INFO L87 Difference]: Start difference. First operand 3126 states and 4444 transitions. Second operand 7 states. [2020-10-26 22:53:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:12,913 INFO L93 Difference]: Finished difference Result 9521 states and 13658 transitions. [2020-10-26 22:53:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:53:12,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2020-10-26 22:53:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:12,951 INFO L225 Difference]: With dead ends: 9521 [2020-10-26 22:53:12,952 INFO L226 Difference]: Without dead ends: 6401 [2020-10-26 22:53:12,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:53:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2020-10-26 22:53:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 6300. [2020-10-26 22:53:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-10-26 22:53:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 8422 transitions. [2020-10-26 22:53:13,140 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 8422 transitions. Word has length 150 [2020-10-26 22:53:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:13,140 INFO L481 AbstractCegarLoop]: Abstraction has 6300 states and 8422 transitions. [2020-10-26 22:53:13,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:53:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 8422 transitions. [2020-10-26 22:53:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 22:53:13,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:13,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:13,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:53:13,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -385384647, now seen corresponding path program 1 times [2020-10-26 22:53:13,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:13,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196263868] [2020-10-26 22:53:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:13,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:14,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:14,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-26 22:53:14,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:53:14,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:14,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:53:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:53:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:14,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:53:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-26 22:53:14,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:14,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:53:14,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:53:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:53:15,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196263868] [2020-10-26 22:53:15,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:53:15,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:53:15,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464178149] [2020-10-26 22:53:15,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:15,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:15,063 INFO L87 Difference]: Start difference. First operand 6300 states and 8422 transitions. Second operand 7 states. [2020-10-26 22:53:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:29,476 INFO L93 Difference]: Finished difference Result 18512 states and 26024 transitions. [2020-10-26 22:53:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:53:29,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2020-10-26 22:53:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:29,553 INFO L225 Difference]: With dead ends: 18512 [2020-10-26 22:53:29,553 INFO L226 Difference]: Without dead ends: 12218 [2020-10-26 22:53:29,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:53:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12218 states. [2020-10-26 22:53:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 11195. [2020-10-26 22:53:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11195 states. [2020-10-26 22:53:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 14003 transitions. [2020-10-26 22:53:29,994 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 14003 transitions. Word has length 184 [2020-10-26 22:53:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:29,995 INFO L481 AbstractCegarLoop]: Abstraction has 11195 states and 14003 transitions. [2020-10-26 22:53:29,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:53:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 14003 transitions. [2020-10-26 22:53:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 22:53:29,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:30,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:30,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:53:30,000 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1072838069, now seen corresponding path program 1 times [2020-10-26 22:53:30,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:30,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399145636] [2020-10-26 22:53:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:30,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:30,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:32,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:32,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 22:53:32,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:53:32,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-26 22:53:32,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:53:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:53:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:53:32,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:32,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:32,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:32,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:32,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 22:53:32,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:53:32,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:32,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:32,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:32,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:32,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:32,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:53:32,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:53:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399145636] [2020-10-26 22:53:33,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:53:33,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:53:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109289798] [2020-10-26 22:53:33,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:33,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:33,175 INFO L87 Difference]: Start difference. First operand 11195 states and 14003 transitions. Second operand 7 states. [2020-10-26 22:53:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:53:47,611 INFO L93 Difference]: Finished difference Result 19693 states and 25512 transitions. [2020-10-26 22:53:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:53:47,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 22:53:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:53:47,679 INFO L225 Difference]: With dead ends: 19693 [2020-10-26 22:53:47,679 INFO L226 Difference]: Without dead ends: 13991 [2020-10-26 22:53:47,695 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 22:53:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13991 states. [2020-10-26 22:53:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13991 to 13777. [2020-10-26 22:53:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13777 states. [2020-10-26 22:53:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 16981 transitions. [2020-10-26 22:53:48,089 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 16981 transitions. Word has length 219 [2020-10-26 22:53:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:53:48,090 INFO L481 AbstractCegarLoop]: Abstraction has 13777 states and 16981 transitions. [2020-10-26 22:53:48,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:53:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 16981 transitions. [2020-10-26 22:53:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 22:53:48,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:53:48,096 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:48,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:53:48,097 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:53:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:53:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash 17180598, now seen corresponding path program 1 times [2020-10-26 22:53:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:53:48,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813973196] [2020-10-26 22:53:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:53:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:48,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:48,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:50,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:50,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 22:53:50,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:53:50,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-26 22:53:50,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:53:50,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:53:50,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:53:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:50,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:50,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:53:50,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:53:50,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:53:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:50,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:53:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:53:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:50,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:50,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:50,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:53:50,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:53:50,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:53:50,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:53:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:53:50,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:53:50,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:50,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:53:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:53:50,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:53:51,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:53:51,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:53:51,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:53:51,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-26 22:53:51,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:53:51,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:53:51,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:53:51,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:53:51,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:53:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:53:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813973196] [2020-10-26 22:53:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:53:51,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:53:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881939859] [2020-10-26 22:53:51,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:53:51,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:53:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:53:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:53:51,320 INFO L87 Difference]: Start difference. First operand 13777 states and 16981 transitions. Second operand 7 states. [2020-10-26 22:54:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:01,801 INFO L93 Difference]: Finished difference Result 22694 states and 28509 transitions. [2020-10-26 22:54:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:54:01,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 246 [2020-10-26 22:54:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:01,834 INFO L225 Difference]: With dead ends: 22694 [2020-10-26 22:54:01,834 INFO L226 Difference]: Without dead ends: 9369 [2020-10-26 22:54:01,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:54:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2020-10-26 22:54:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 8869. [2020-10-26 22:54:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8869 states. [2020-10-26 22:54:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 10646 transitions. [2020-10-26 22:54:02,087 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 10646 transitions. Word has length 246 [2020-10-26 22:54:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:02,087 INFO L481 AbstractCegarLoop]: Abstraction has 8869 states and 10646 transitions. [2020-10-26 22:54:02,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:54:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 10646 transitions. [2020-10-26 22:54:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-26 22:54:02,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:02,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:02,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:54:02,095 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -604445380, now seen corresponding path program 1 times [2020-10-26 22:54:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:02,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005951789] [2020-10-26 22:54:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:02,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:02,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:02,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:04,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:04,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-26 22:54:04,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:54:04,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-10-26 22:54:04,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:54:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:54:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:04,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:04,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:04,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:04,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:04,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:04,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:54:04,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:04,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:04,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:54:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:54:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:04,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:04,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:04,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:54:04,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:04,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 22:54:04,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:04,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:04,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:04,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:54:04,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:04,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:54:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:04,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:04,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:54:04,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:54:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:54:05,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005951789] [2020-10-26 22:54:05,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:54:05,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:54:05,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233184143] [2020-10-26 22:54:05,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:54:05,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:05,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:54:05,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:54:05,102 INFO L87 Difference]: Start difference. First operand 8869 states and 10646 transitions. Second operand 7 states. [2020-10-26 22:54:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:22,741 INFO L93 Difference]: Finished difference Result 25298 states and 31894 transitions. [2020-10-26 22:54:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:54:22,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 305 [2020-10-26 22:54:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:22,809 INFO L225 Difference]: With dead ends: 25298 [2020-10-26 22:54:22,810 INFO L226 Difference]: Without dead ends: 17202 [2020-10-26 22:54:22,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:54:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17202 states. [2020-10-26 22:54:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17202 to 17051. [2020-10-26 22:54:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17051 states. [2020-10-26 22:54:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17051 states to 17051 states and 20715 transitions. [2020-10-26 22:54:23,298 INFO L78 Accepts]: Start accepts. Automaton has 17051 states and 20715 transitions. Word has length 305 [2020-10-26 22:54:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:23,298 INFO L481 AbstractCegarLoop]: Abstraction has 17051 states and 20715 transitions. [2020-10-26 22:54:23,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:54:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17051 states and 20715 transitions. [2020-10-26 22:54:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 22:54:23,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:23,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:23,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:54:23,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:23,306 INFO L82 PathProgramCache]: Analyzing trace with hash -729119692, now seen corresponding path program 1 times [2020-10-26 22:54:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:23,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406412460] [2020-10-26 22:54:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:23,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:25,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 22:54:25,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:54:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-26 22:54:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:54:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:54:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 22:54:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:25,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:25,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:25,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:25,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:54:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:25,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:26,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:26,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:26,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:54:26,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:26,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:54:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:26,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:54:26,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:54:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 206 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:54:26,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406412460] [2020-10-26 22:54:26,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:54:26,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:54:26,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494647353] [2020-10-26 22:54:26,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:54:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:54:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:54:26,595 INFO L87 Difference]: Start difference. First operand 17051 states and 20715 transitions. Second operand 6 states. [2020-10-26 22:54:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:41,863 INFO L93 Difference]: Finished difference Result 39081 states and 49515 transitions. [2020-10-26 22:54:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 22:54:41,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 309 [2020-10-26 22:54:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:41,931 INFO L225 Difference]: With dead ends: 39081 [2020-10-26 22:54:41,932 INFO L226 Difference]: Without dead ends: 22803 [2020-10-26 22:54:41,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:54:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22803 states. [2020-10-26 22:54:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22803 to 22760. [2020-10-26 22:54:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22760 states. [2020-10-26 22:54:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22760 states to 22760 states and 28599 transitions. [2020-10-26 22:54:42,441 INFO L78 Accepts]: Start accepts. Automaton has 22760 states and 28599 transitions. Word has length 309 [2020-10-26 22:54:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:42,444 INFO L481 AbstractCegarLoop]: Abstraction has 22760 states and 28599 transitions. [2020-10-26 22:54:42,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:54:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 22760 states and 28599 transitions. [2020-10-26 22:54:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-26 22:54:42,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:42,456 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:42,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:54:42,457 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1915879414, now seen corresponding path program 1 times [2020-10-26 22:54:42,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:42,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349231827] [2020-10-26 22:54:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:44,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:44,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:54:44,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:54:44,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:44,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:44,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:44,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:44,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:54:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:44,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:54:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:44,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:44,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:54:44,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 22:54:44,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:54:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:44,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:54:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:45,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:45,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:45,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:54:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:54:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:54:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:54:45,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349231827] [2020-10-26 22:54:45,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:54:45,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:54:45,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563588828] [2020-10-26 22:54:45,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:54:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:54:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:54:45,364 INFO L87 Difference]: Start difference. First operand 22760 states and 28599 transitions. Second operand 7 states. [2020-10-26 22:54:46,534 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:55:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:03,426 INFO L93 Difference]: Finished difference Result 61280 states and 82929 transitions. [2020-10-26 22:55:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:55:03,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 310 [2020-10-26 22:55:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:03,575 INFO L225 Difference]: With dead ends: 61280 [2020-10-26 22:55:03,575 INFO L226 Difference]: Without dead ends: 39293 [2020-10-26 22:55:03,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:55:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39293 states. [2020-10-26 22:55:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39293 to 38933. [2020-10-26 22:55:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38933 states. [2020-10-26 22:55:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38933 states to 38933 states and 48346 transitions. [2020-10-26 22:55:04,591 INFO L78 Accepts]: Start accepts. Automaton has 38933 states and 48346 transitions. Word has length 310 [2020-10-26 22:55:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:04,592 INFO L481 AbstractCegarLoop]: Abstraction has 38933 states and 48346 transitions. [2020-10-26 22:55:04,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:55:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 38933 states and 48346 transitions. [2020-10-26 22:55:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-26 22:55:04,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:04,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:04,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:55:04,600 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2090503400, now seen corresponding path program 1 times [2020-10-26 22:55:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:04,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676180756] [2020-10-26 22:55:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:05,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:05,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 22:55:05,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:05,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:05,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:05,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:05,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:05,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:05,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:05,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:05,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:05,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:55:05,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:05,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:05,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:55:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:06,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:06,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:55:06,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:06,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 22:55:06,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:55:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 22:55:06,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676180756] [2020-10-26 22:55:06,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:06,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:55:06,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596072684] [2020-10-26 22:55:06,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:55:06,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:55:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:55:06,281 INFO L87 Difference]: Start difference. First operand 38933 states and 48346 transitions. Second operand 5 states. [2020-10-26 22:55:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:21,333 INFO L93 Difference]: Finished difference Result 90423 states and 116996 transitions. [2020-10-26 22:55:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:55:21,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-26 22:55:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:21,494 INFO L225 Difference]: With dead ends: 90423 [2020-10-26 22:55:21,494 INFO L226 Difference]: Without dead ends: 52263 [2020-10-26 22:55:21,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:55:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52263 states. [2020-10-26 22:55:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52263 to 52212. [2020-10-26 22:55:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52212 states. [2020-10-26 22:55:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52212 states to 52212 states and 66931 transitions. [2020-10-26 22:55:23,169 INFO L78 Accepts]: Start accepts. Automaton has 52212 states and 66931 transitions. Word has length 319 [2020-10-26 22:55:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:23,170 INFO L481 AbstractCegarLoop]: Abstraction has 52212 states and 66931 transitions. [2020-10-26 22:55:23,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:55:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 52212 states and 66931 transitions. [2020-10-26 22:55:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-26 22:55:23,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:23,179 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:23,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:55:23,180 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -280151459, now seen corresponding path program 1 times [2020-10-26 22:55:23,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:23,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058433851] [2020-10-26 22:55:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:25,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:25,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-26 22:55:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:55:25,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1927 [2020-10-26 22:55:25,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:55:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:25,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:25,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:25,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:25,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:25,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:25,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:25,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:25,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:55:25,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:55:25,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:25,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:55:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:25,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:55:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 22:55:25,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:55:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-10-26 22:55:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:25,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:55:25,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-26 22:55:26,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058433851] [2020-10-26 22:55:26,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:26,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:55:26,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25295146] [2020-10-26 22:55:26,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:55:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:55:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:55:26,044 INFO L87 Difference]: Start difference. First operand 52212 states and 66931 transitions. Second operand 7 states. [2020-10-26 22:55:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:42,565 INFO L93 Difference]: Finished difference Result 123032 states and 166722 transitions. [2020-10-26 22:55:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:55:42,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 392 [2020-10-26 22:55:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:42,957 INFO L225 Difference]: With dead ends: 123032 [2020-10-26 22:55:42,958 INFO L226 Difference]: Without dead ends: 71593 [2020-10-26 22:55:43,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:55:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71593 states. [2020-10-26 22:55:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71593 to 70622. [2020-10-26 22:55:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70622 states. [2020-10-26 22:55:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70622 states to 70622 states and 95041 transitions. [2020-10-26 22:55:45,248 INFO L78 Accepts]: Start accepts. Automaton has 70622 states and 95041 transitions. Word has length 392 [2020-10-26 22:55:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:45,249 INFO L481 AbstractCegarLoop]: Abstraction has 70622 states and 95041 transitions. [2020-10-26 22:55:45,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:55:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 70622 states and 95041 transitions. [2020-10-26 22:55:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-10-26 22:55:45,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:45,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:45,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:55:45,259 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash -392565631, now seen corresponding path program 1 times [2020-10-26 22:55:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414547585] [2020-10-26 22:55:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:49,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:49,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-10-26 22:55:49,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:55:49,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3905 [2020-10-26 22:55:49,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:55:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:55:49,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-26 22:55:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:49,555 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:55:49,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:49,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:49,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:49,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:49,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:55:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:49,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:49,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:55:49,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:55:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:49,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:55:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:49,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 22:55:49,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-10-26 22:55:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:50,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:50,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:50,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:55:50,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:50,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:55:50,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:55:50,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 447 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:55:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414547585] [2020-10-26 22:55:50,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:50,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 22:55:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235078509] [2020-10-26 22:55:50,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:55:50,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:55:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:55:50,550 INFO L87 Difference]: Start difference. First operand 70622 states and 95041 transitions. Second operand 10 states. [2020-10-26 22:55:52,792 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 22:55:57,183 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 22:55:58,109 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 72