/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:14:09,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:14:09,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:14:09,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:14:09,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:14:09,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:14:09,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:14:09,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:14:09,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:14:09,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:14:09,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:14:09,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:14:09,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:14:09,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:14:09,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:14:09,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:14:09,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:14:09,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:14:09,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:14:09,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:14:09,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:14:09,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:14:09,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:14:09,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:14:09,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:14:09,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:14:09,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:14:09,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:14:09,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:14:09,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:14:09,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:14:09,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:14:09,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:14:09,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:14:09,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:14:09,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:14:09,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:14:09,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:14:09,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:14:09,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:14:09,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:14:09,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:14:09,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:14:09,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:14:09,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:14:09,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:14:09,165 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:14:09,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:14:09,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:14:09,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:14:09,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:14:09,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:14:09,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:14:09,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:14:09,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:14:09,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:14:09,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:14:09,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:14:09,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:14:09,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:14:09,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:14:09,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:14:09,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:14:09,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:14:09,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:14:09,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:14:09,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:14:09,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:14:09,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:14:09,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:14:09,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:14:09,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:14:09,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:14:09,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:14:09,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:14:09,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:14:09,555 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:14:09,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:14:09,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/082228eec/da78d55dc2d9435ab35a576921c6b28e/FLAGfba730e3e [2020-10-28 00:14:10,396 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:14:10,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:14:10,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/082228eec/da78d55dc2d9435ab35a576921c6b28e/FLAGfba730e3e [2020-10-28 00:14:10,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/082228eec/da78d55dc2d9435ab35a576921c6b28e [2020-10-28 00:14:10,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:14:10,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:14:10,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:10,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:14:10,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:14:10,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:10" (1/1) ... [2020-10-28 00:14:10,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8d7f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:10, skipping insertion in model container [2020-10-28 00:14:10,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:10" (1/1) ... [2020-10-28 00:14:10,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:14:10,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:14:11,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:11,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:14:11,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:11,257 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:14:11,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11 WrapperNode [2020-10-28 00:14:11,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:11,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:14:11,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:14:11,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:14:11,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... [2020-10-28 00:14:11,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:14:11,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:14:11,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:14:11,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:14:11,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:14:11,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:14:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:14:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:14:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:14:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:14:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:14:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:14:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:14:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:14:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:14:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:14:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:14:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:14:12,214 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:14:12,214 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:14:12,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:12 BoogieIcfgContainer [2020-10-28 00:14:12,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:14:12,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:14:12,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:14:12,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:14:12,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:14:10" (1/3) ... [2020-10-28 00:14:12,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f4c4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:12, skipping insertion in model container [2020-10-28 00:14:12,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:11" (2/3) ... [2020-10-28 00:14:12,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f4c4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:12, skipping insertion in model container [2020-10-28 00:14:12,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:12" (3/3) ... [2020-10-28 00:14:12,226 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:14:12,238 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:14:12,244 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:14:12,257 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:14:12,286 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:14:12,286 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:14:12,287 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:14:12,287 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:14:12,287 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:14:12,287 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:14:12,287 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:14:12,287 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:14:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-10-28 00:14:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 00:14:12,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:12,321 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] [2020-10-28 00:14:12,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2088021378, now seen corresponding path program 1 times [2020-10-28 00:14:12,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:12,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591952541] [2020-10-28 00:14:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:12,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:17,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 00:14:17,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:14:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 00:14:17,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:14:17,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:14:17,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:14:18,052 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:18,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:18,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:18,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:18,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:18,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:18,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:14:18,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:18,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:18,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:18,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:18,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:14:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:18,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591952541] [2020-10-28 00:14:18,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:18,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630419524] [2020-10-28 00:14:18,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:18,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:18,169 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 4 states. [2020-10-28 00:14:18,452 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:19,194 INFO L93 Difference]: Finished difference Result 273 states and 434 transitions. [2020-10-28 00:14:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:19,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 00:14:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:19,220 INFO L225 Difference]: With dead ends: 273 [2020-10-28 00:14:19,220 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 00:14:19,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 00:14:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-28 00:14:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 00:14:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 258 transitions. [2020-10-28 00:14:19,291 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 258 transitions. Word has length 53 [2020-10-28 00:14:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:19,291 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 258 transitions. [2020-10-28 00:14:19,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 258 transitions. [2020-10-28 00:14:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:14:19,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:19,294 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] [2020-10-28 00:14:19,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:14:19,295 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:19,296 INFO L82 PathProgramCache]: Analyzing trace with hash -963535353, now seen corresponding path program 1 times [2020-10-28 00:14:19,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:19,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093419740] [2020-10-28 00:14:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:19,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:19,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:19,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:14:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:14:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:22,045 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:22,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:22,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:22,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:22,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:22,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:14:22,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:22,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:22,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093419740] [2020-10-28 00:14:22,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:22,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:22,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723465777] [2020-10-28 00:14:22,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:22,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:22,116 INFO L87 Difference]: Start difference. First operand 174 states and 258 transitions. Second operand 4 states. [2020-10-28 00:14:22,328 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:22,809 INFO L93 Difference]: Finished difference Result 428 states and 660 transitions. [2020-10-28 00:14:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:22,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:14:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:22,813 INFO L225 Difference]: With dead ends: 428 [2020-10-28 00:14:22,813 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 00:14:22,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 00:14:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-10-28 00:14:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-28 00:14:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 429 transitions. [2020-10-28 00:14:22,866 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 429 transitions. Word has length 54 [2020-10-28 00:14:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:22,867 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 429 transitions. [2020-10-28 00:14:22,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 429 transitions. [2020-10-28 00:14:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:14:22,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:22,878 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] [2020-10-28 00:14:22,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:14:22,878 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash -408787207, now seen corresponding path program 1 times [2020-10-28 00:14:22,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:22,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603777535] [2020-10-28 00:14:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:22,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:24,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:24,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:14:24,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:14:24,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-10-28 00:14:24,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:14:24,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:14:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:24,433 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:24,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:24,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:24,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:24,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603777535] [2020-10-28 00:14:24,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:24,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952380310] [2020-10-28 00:14:24,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:24,474 INFO L87 Difference]: Start difference. First operand 282 states and 429 transitions. Second operand 4 states. [2020-10-28 00:14:24,719 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:25,412 INFO L93 Difference]: Finished difference Result 720 states and 1121 transitions. [2020-10-28 00:14:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:25,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:14:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:25,418 INFO L225 Difference]: With dead ends: 720 [2020-10-28 00:14:25,418 INFO L226 Difference]: Without dead ends: 469 [2020-10-28 00:14:25,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-28 00:14:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2020-10-28 00:14:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 00:14:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 717 transitions. [2020-10-28 00:14:25,486 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 717 transitions. Word has length 55 [2020-10-28 00:14:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:25,489 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 717 transitions. [2020-10-28 00:14:25,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 717 transitions. [2020-10-28 00:14:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:14:25,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:25,493 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] [2020-10-28 00:14:25,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:14:25,493 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash 427450534, now seen corresponding path program 1 times [2020-10-28 00:14:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:25,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652426038] [2020-10-28 00:14:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:26,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:14:26,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-28 00:14:26,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:14:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:14:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:26,310 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:26,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:26,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:26,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:26,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652426038] [2020-10-28 00:14:26,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:26,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720018191] [2020-10-28 00:14:26,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:26,372 INFO L87 Difference]: Start difference. First operand 466 states and 717 transitions. Second operand 4 states. [2020-10-28 00:14:26,628 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:27,414 INFO L93 Difference]: Finished difference Result 1208 states and 1881 transitions. [2020-10-28 00:14:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:27,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:14:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:27,427 INFO L225 Difference]: With dead ends: 1208 [2020-10-28 00:14:27,427 INFO L226 Difference]: Without dead ends: 773 [2020-10-28 00:14:27,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2020-10-28 00:14:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2020-10-28 00:14:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-28 00:14:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1185 transitions. [2020-10-28 00:14:27,477 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1185 transitions. Word has length 56 [2020-10-28 00:14:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:27,477 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1185 transitions. [2020-10-28 00:14:27,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1185 transitions. [2020-10-28 00:14:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:14:27,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:27,478 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] [2020-10-28 00:14:27,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:14:27,479 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1420275068, now seen corresponding path program 1 times [2020-10-28 00:14:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626340927] [2020-10-28 00:14:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:27,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:14:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-28 00:14:28,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:14:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:14:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:14:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:28,933 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:28,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:28,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:14:28,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:28,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626340927] [2020-10-28 00:14:28,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:28,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:14:28,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635877647] [2020-10-28 00:14:28,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:14:28,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:14:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:14:28,999 INFO L87 Difference]: Start difference. First operand 770 states and 1185 transitions. Second operand 7 states. [2020-10-28 00:14:29,280 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:14:30,119 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:30,393 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:30,626 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:14:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:30,789 INFO L93 Difference]: Finished difference Result 4465 states and 6955 transitions. [2020-10-28 00:14:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:14:30,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 00:14:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:30,814 INFO L225 Difference]: With dead ends: 4465 [2020-10-28 00:14:30,814 INFO L226 Difference]: Without dead ends: 3726 [2020-10-28 00:14:30,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:14:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2020-10-28 00:14:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 1506. [2020-10-28 00:14:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-10-28 00:14:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2305 transitions. [2020-10-28 00:14:30,955 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2305 transitions. Word has length 57 [2020-10-28 00:14:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:30,958 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2305 transitions. [2020-10-28 00:14:30,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:14:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2305 transitions. [2020-10-28 00:14:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:14:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:30,961 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] [2020-10-28 00:14:30,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:14:30,961 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608408, now seen corresponding path program 1 times [2020-10-28 00:14:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:30,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806560001] [2020-10-28 00:14:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:31,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:14:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 00:14:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:14:31,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:31,794 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:31,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:31,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:31,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806560001] [2020-10-28 00:14:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:14:31,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214115562] [2020-10-28 00:14:31,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:14:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:14:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:31,858 INFO L87 Difference]: Start difference. First operand 1506 states and 2305 transitions. Second operand 5 states. [2020-10-28 00:14:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:32,682 INFO L93 Difference]: Finished difference Result 3045 states and 4643 transitions. [2020-10-28 00:14:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:14:32,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-28 00:14:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:32,700 INFO L225 Difference]: With dead ends: 3045 [2020-10-28 00:14:32,700 INFO L226 Difference]: Without dead ends: 3042 [2020-10-28 00:14:32,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-10-28 00:14:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1570. [2020-10-28 00:14:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1570 states. [2020-10-28 00:14:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2369 transitions. [2020-10-28 00:14:32,876 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2369 transitions. Word has length 58 [2020-10-28 00:14:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:32,877 INFO L481 AbstractCegarLoop]: Abstraction has 1570 states and 2369 transitions. [2020-10-28 00:14:32,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:14:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2369 transitions. [2020-10-28 00:14:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:14:32,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:32,878 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] [2020-10-28 00:14:32,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:14:32,879 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash 575719989, now seen corresponding path program 1 times [2020-10-28 00:14:32,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:32,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212579856] [2020-10-28 00:14:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:32,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:32,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:33,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:33,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:14:33,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:33,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-28 00:14:33,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:33,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:14:33,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:14:33,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:14:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:33,650 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:33,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:33,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:33,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:33,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212579856] [2020-10-28 00:14:33,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:33,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:14:33,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537662415] [2020-10-28 00:14:33,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:14:33,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:14:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:14:33,700 INFO L87 Difference]: Start difference. First operand 1570 states and 2369 transitions. Second operand 7 states. [2020-10-28 00:14:34,560 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 00:14:34,808 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:14:35,068 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 00:14:35,312 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:14:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:36,401 INFO L93 Difference]: Finished difference Result 6830 states and 10249 transitions. [2020-10-28 00:14:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:14:36,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-28 00:14:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:36,428 INFO L225 Difference]: With dead ends: 6830 [2020-10-28 00:14:36,428 INFO L226 Difference]: Without dead ends: 5291 [2020-10-28 00:14:36,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:14:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2020-10-28 00:14:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5282. [2020-10-28 00:14:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5282 states. [2020-10-28 00:14:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 7873 transitions. [2020-10-28 00:14:36,958 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 7873 transitions. Word has length 59 [2020-10-28 00:14:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:36,958 INFO L481 AbstractCegarLoop]: Abstraction has 5282 states and 7873 transitions. [2020-10-28 00:14:36,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:14:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 7873 transitions. [2020-10-28 00:14:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:14:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:36,960 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] [2020-10-28 00:14:36,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:14:36,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 839477164, now seen corresponding path program 1 times [2020-10-28 00:14:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:36,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569524509] [2020-10-28 00:14:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:37,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 00:14:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:37,636 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:37,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:37,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:37,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:37,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:37,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569524509] [2020-10-28 00:14:37,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:37,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:37,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29718339] [2020-10-28 00:14:37,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:37,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:37,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:37,672 INFO L87 Difference]: Start difference. First operand 5282 states and 7873 transitions. Second operand 4 states. [2020-10-28 00:14:37,895 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:38,837 INFO L93 Difference]: Finished difference Result 12898 states and 19243 transitions. [2020-10-28 00:14:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:38,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 00:14:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:38,876 INFO L225 Difference]: With dead ends: 12898 [2020-10-28 00:14:38,876 INFO L226 Difference]: Without dead ends: 7647 [2020-10-28 00:14:38,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7647 states. [2020-10-28 00:14:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7647 to 7644. [2020-10-28 00:14:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7644 states. [2020-10-28 00:14:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7644 states to 7644 states and 11343 transitions. [2020-10-28 00:14:39,649 INFO L78 Accepts]: Start accepts. Automaton has 7644 states and 11343 transitions. Word has length 61 [2020-10-28 00:14:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:39,650 INFO L481 AbstractCegarLoop]: Abstraction has 7644 states and 11343 transitions. [2020-10-28 00:14:39,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7644 states and 11343 transitions. [2020-10-28 00:14:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:14:39,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:39,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:14:39,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:14:39,656 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 3452349, now seen corresponding path program 1 times [2020-10-28 00:14:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:39,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002438118] [2020-10-28 00:14:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:39,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:40,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:40,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:14:40,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:14:40,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-28 00:14:40,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:40,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:14:40,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:14:40,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 00:14:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:14:40,567 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:40,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:40,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:40,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:40,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:40,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:40,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:14:40,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:40,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:40,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:40,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:40,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:14:40,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002438118] [2020-10-28 00:14:40,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:40,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:14:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985783028] [2020-10-28 00:14:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:14:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:14:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:40,617 INFO L87 Difference]: Start difference. First operand 7644 states and 11343 transitions. Second operand 5 states. [2020-10-28 00:14:40,927 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:14:41,828 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:42,491 INFO L93 Difference]: Finished difference Result 17861 states and 26581 transitions. [2020-10-28 00:14:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:14:42,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:14:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:42,544 INFO L225 Difference]: With dead ends: 17861 [2020-10-28 00:14:42,544 INFO L226 Difference]: Without dead ends: 12610 [2020-10-28 00:14:42,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:14:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12610 states. [2020-10-28 00:14:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12610 to 12604. [2020-10-28 00:14:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12604 states. [2020-10-28 00:14:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12604 states to 12604 states and 18607 transitions. [2020-10-28 00:14:43,692 INFO L78 Accepts]: Start accepts. Automaton has 12604 states and 18607 transitions. Word has length 82 [2020-10-28 00:14:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:43,692 INFO L481 AbstractCegarLoop]: Abstraction has 12604 states and 18607 transitions. [2020-10-28 00:14:43,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:14:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12604 states and 18607 transitions. [2020-10-28 00:14:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:14:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:43,699 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:14:43,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:14:43,699 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash 296353029, now seen corresponding path program 1 times [2020-10-28 00:14:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:43,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688524584] [2020-10-28 00:14:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:43,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:43,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:46,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:46,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:14:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:14:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-28 00:14:46,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:14:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:14:46,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:46,947 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:46,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:46,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:46,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:46,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:46,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:14:46,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:46,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:46,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:14:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688524584] [2020-10-28 00:14:46,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:14:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180174530] [2020-10-28 00:14:46,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:46,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:46,998 INFO L87 Difference]: Start difference. First operand 12604 states and 18607 transitions. Second operand 6 states. [2020-10-28 00:14:48,166 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:48,488 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:14:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:49,356 INFO L93 Difference]: Finished difference Result 32492 states and 47425 transitions. [2020-10-28 00:14:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:14:49,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:14:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:49,411 INFO L225 Difference]: With dead ends: 32492 [2020-10-28 00:14:49,411 INFO L226 Difference]: Without dead ends: 19921 [2020-10-28 00:14:49,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:14:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19921 states. [2020-10-28 00:14:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19921 to 13056. [2020-10-28 00:14:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13056 states. [2020-10-28 00:14:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 18815 transitions. [2020-10-28 00:14:50,719 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 18815 transitions. Word has length 83 [2020-10-28 00:14:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:50,719 INFO L481 AbstractCegarLoop]: Abstraction has 13056 states and 18815 transitions. [2020-10-28 00:14:50,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:14:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 18815 transitions. [2020-10-28 00:14:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:14:50,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:50,725 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:14:50,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:14:50,725 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1653567376, now seen corresponding path program 1 times [2020-10-28 00:14:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269964846] [2020-10-28 00:14:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:54,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:14:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:14:55,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:55,998 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:14:55,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:56,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:14:56,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:56,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269964846] [2020-10-28 00:14:56,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:56,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:56,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751028244] [2020-10-28 00:14:56,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:56,038 INFO L87 Difference]: Start difference. First operand 13056 states and 18815 transitions. Second operand 4 states. [2020-10-28 00:14:56,344 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:14:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:58,195 INFO L93 Difference]: Finished difference Result 31093 states and 44811 transitions. [2020-10-28 00:14:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:58,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:14:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:58,245 INFO L225 Difference]: With dead ends: 31093 [2020-10-28 00:14:58,245 INFO L226 Difference]: Without dead ends: 20682 [2020-10-28 00:14:58,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:14:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20682 states. [2020-10-28 00:15:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20682 to 19667. [2020-10-28 00:15:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19667 states. [2020-10-28 00:15:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 28077 transitions. [2020-10-28 00:15:00,234 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 28077 transitions. Word has length 83 [2020-10-28 00:15:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:00,234 INFO L481 AbstractCegarLoop]: Abstraction has 19667 states and 28077 transitions. [2020-10-28 00:15:00,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 28077 transitions. [2020-10-28 00:15:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:15:00,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:00,240 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:15:00,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:15:00,241 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -240903439, now seen corresponding path program 1 times [2020-10-28 00:15:00,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:00,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282745906] [2020-10-28 00:15:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:00,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:00,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:02,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:05,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:05,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:15:05,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:15:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:15:05,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:15:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:15:05,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:05,505 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:15:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:05,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:05,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282745906] [2020-10-28 00:15:05,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:05,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474828576] [2020-10-28 00:15:05,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:05,536 INFO L87 Difference]: Start difference. First operand 19667 states and 28077 transitions. Second operand 4 states. [2020-10-28 00:15:05,857 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:15:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:08,008 INFO L93 Difference]: Finished difference Result 41101 states and 58507 transitions. [2020-10-28 00:15:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:08,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:15:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:08,056 INFO L225 Difference]: With dead ends: 41101 [2020-10-28 00:15:08,056 INFO L226 Difference]: Without dead ends: 27786 [2020-10-28 00:15:08,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27786 states. [2020-10-28 00:15:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27786 to 26631. [2020-10-28 00:15:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26631 states. [2020-10-28 00:15:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26631 states to 26631 states and 37509 transitions. [2020-10-28 00:15:10,359 INFO L78 Accepts]: Start accepts. Automaton has 26631 states and 37509 transitions. Word has length 83 [2020-10-28 00:15:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:10,359 INFO L481 AbstractCegarLoop]: Abstraction has 26631 states and 37509 transitions. [2020-10-28 00:15:10,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26631 states and 37509 transitions. [2020-10-28 00:15:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:15:10,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:10,371 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:15:10,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:15:10,371 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1847054984, now seen corresponding path program 1 times [2020-10-28 00:15:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:10,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373520921] [2020-10-28 00:15:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:12,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:15,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:15,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:15:15,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:15:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:15:15,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:15:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:15:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:15,648 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:15:15,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:15,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373520921] [2020-10-28 00:15:15,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:15,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:15,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883897956] [2020-10-28 00:15:15,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:15,680 INFO L87 Difference]: Start difference. First operand 26631 states and 37509 transitions. Second operand 4 states. [2020-10-28 00:15:15,932 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:15:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:18,360 INFO L93 Difference]: Finished difference Result 43040 states and 60412 transitions. [2020-10-28 00:15:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:18,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:15:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:18,394 INFO L225 Difference]: With dead ends: 43040 [2020-10-28 00:15:18,394 INFO L226 Difference]: Without dead ends: 27752 [2020-10-28 00:15:18,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27752 states. [2020-10-28 00:15:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27752 to 26847. [2020-10-28 00:15:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26847 states. [2020-10-28 00:15:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 37224 transitions. [2020-10-28 00:15:20,489 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 37224 transitions. Word has length 83 [2020-10-28 00:15:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:20,490 INFO L481 AbstractCegarLoop]: Abstraction has 26847 states and 37224 transitions. [2020-10-28 00:15:20,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 37224 transitions. [2020-10-28 00:15:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:15:20,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:20,500 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:15:20,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:15:20,500 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -373647486, now seen corresponding path program 1 times [2020-10-28 00:15:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:20,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694435940] [2020-10-28 00:15:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:20,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:20,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:21,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:15:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:15:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:23,093 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:15:23,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:23,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:23,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:15:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694435940] [2020-10-28 00:15:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:15:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:15:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525894127] [2020-10-28 00:15:23,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:23,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:23,120 INFO L87 Difference]: Start difference. First operand 26847 states and 37224 transitions. Second operand 6 states. [2020-10-28 00:15:24,768 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:15:25,201 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:15:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:30,287 INFO L93 Difference]: Finished difference Result 104242 states and 143909 transitions. [2020-10-28 00:15:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:15:30,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:15:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:30,415 INFO L225 Difference]: With dead ends: 104242 [2020-10-28 00:15:30,415 INFO L226 Difference]: Without dead ends: 77434 [2020-10-28 00:15:30,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:15:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77434 states. [2020-10-28 00:15:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77434 to 37498. [2020-10-28 00:15:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37498 states. [2020-10-28 00:15:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37498 states to 37498 states and 50806 transitions. [2020-10-28 00:15:34,225 INFO L78 Accepts]: Start accepts. Automaton has 37498 states and 50806 transitions. Word has length 83 [2020-10-28 00:15:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 37498 states and 50806 transitions. [2020-10-28 00:15:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37498 states and 50806 transitions. [2020-10-28 00:15:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:15:34,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:34,236 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:15:34,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:15:34,237 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1248976113, now seen corresponding path program 1 times [2020-10-28 00:15:34,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:34,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009004223] [2020-10-28 00:15:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:34,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:34,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:34,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1916 [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:36,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:15:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:15:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:36,441 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:15:36,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:36,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:36,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:36,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009004223] [2020-10-28 00:15:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:15:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:15:36,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512109867] [2020-10-28 00:15:36,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:36,475 INFO L87 Difference]: Start difference. First operand 37498 states and 50806 transitions. Second operand 6 states. [2020-10-28 00:15:38,289 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:15:38,801 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:15:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:45,168 INFO L93 Difference]: Finished difference Result 120991 states and 163209 transitions. [2020-10-28 00:15:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:15:45,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:15:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:45,284 INFO L225 Difference]: With dead ends: 120991 [2020-10-28 00:15:45,284 INFO L226 Difference]: Without dead ends: 83561 [2020-10-28 00:15:45,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:15:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83561 states. [2020-10-28 00:15:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83561 to 46080. [2020-10-28 00:15:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46080 states. [2020-10-28 00:15:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46080 states to 46080 states and 61676 transitions. [2020-10-28 00:15:49,751 INFO L78 Accepts]: Start accepts. Automaton has 46080 states and 61676 transitions. Word has length 83 [2020-10-28 00:15:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 46080 states and 61676 transitions. [2020-10-28 00:15:49,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 46080 states and 61676 transitions. [2020-10-28 00:15:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:15:49,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:49,763 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:15:49,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:15:49,764 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash -551896553, now seen corresponding path program 1 times [2020-10-28 00:15:49,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:49,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144702537] [2020-10-28 00:15:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:49,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:50,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:52,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:15:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:15:54,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:55,047 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:15:55,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:55,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:55,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:55,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:55,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:55,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144702537] [2020-10-28 00:15:55,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:55,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771725605] [2020-10-28 00:15:55,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:55,082 INFO L87 Difference]: Start difference. First operand 46080 states and 61676 transitions. Second operand 4 states. [2020-10-28 00:15:55,357 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:16:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:01,810 INFO L93 Difference]: Finished difference Result 111130 states and 148977 transitions. [2020-10-28 00:16:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:16:01,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 00:16:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:01,903 INFO L225 Difference]: With dead ends: 111130 [2020-10-28 00:16:01,904 INFO L226 Difference]: Without dead ends: 70060 [2020-10-28 00:16:01,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:16:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70060 states. [2020-10-28 00:16:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70060 to 69908. [2020-10-28 00:16:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69908 states. [2020-10-28 00:16:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69908 states to 69908 states and 92895 transitions. [2020-10-28 00:16:08,329 INFO L78 Accepts]: Start accepts. Automaton has 69908 states and 92895 transitions. Word has length 83 [2020-10-28 00:16:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:08,329 INFO L481 AbstractCegarLoop]: Abstraction has 69908 states and 92895 transitions. [2020-10-28 00:16:08,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:16:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 69908 states and 92895 transitions. [2020-10-28 00:16:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:16:08,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:08,341 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:16:08,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:16:08,341 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:08,342 INFO L82 PathProgramCache]: Analyzing trace with hash 998805402, now seen corresponding path program 1 times [2020-10-28 00:16:08,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:08,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813739715] [2020-10-28 00:16:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:08,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:08,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:08,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:10,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:16:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:16:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:10,437 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:16:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:10,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:10,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:10,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:10,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:10,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:10,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813739715] [2020-10-28 00:16:10,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:16:10,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:16:10,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304501277] [2020-10-28 00:16:10,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:16:10,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:16:10,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:16:10,468 INFO L87 Difference]: Start difference. First operand 69908 states and 92895 transitions. Second operand 6 states. [2020-10-28 00:16:12,757 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:16:13,461 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:16:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:25,421 INFO L93 Difference]: Finished difference Result 214285 states and 283125 transitions. [2020-10-28 00:16:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:16:25,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 00:16:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:25,847 INFO L225 Difference]: With dead ends: 214285 [2020-10-28 00:16:25,847 INFO L226 Difference]: Without dead ends: 144528 [2020-10-28 00:16:25,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:16:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144528 states. [2020-10-28 00:16:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144528 to 85404. [2020-10-28 00:16:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85404 states. [2020-10-28 00:16:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85404 states to 85404 states and 112262 transitions. [2020-10-28 00:16:34,671 INFO L78 Accepts]: Start accepts. Automaton has 85404 states and 112262 transitions. Word has length 83 [2020-10-28 00:16:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:34,671 INFO L481 AbstractCegarLoop]: Abstraction has 85404 states and 112262 transitions. [2020-10-28 00:16:34,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:16:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 85404 states and 112262 transitions. [2020-10-28 00:16:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:16:34,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:34,687 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:16:34,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:16:34,687 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:34,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1663041529, now seen corresponding path program 1 times [2020-10-28 00:16:34,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:34,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055432402] [2020-10-28 00:16:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:34,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:37,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:37,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:39,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:39,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:16:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:16:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:40,200 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:16:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:40,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:40,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:40,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:40,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:16:40,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055432402] [2020-10-28 00:16:40,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:16:40,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:16:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871117827] [2020-10-28 00:16:40,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:16:40,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:16:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:16:40,241 INFO L87 Difference]: Start difference. First operand 85404 states and 112262 transitions. Second operand 11 states. [2020-10-28 00:16:40,565 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:16:47,168 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:16:48,621 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:17:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:24,351 INFO L93 Difference]: Finished difference Result 442178 states and 575936 transitions. [2020-10-28 00:17:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 00:17:24,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-28 00:17:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:25,036 INFO L225 Difference]: With dead ends: 442178 [2020-10-28 00:17:25,036 INFO L226 Difference]: Without dead ends: 356921 [2020-10-28 00:17:25,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 00:17:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356921 states. [2020-10-28 00:17:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356921 to 99958. [2020-10-28 00:17:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99958 states. [2020-10-28 00:17:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99958 states to 99958 states and 131587 transitions. [2020-10-28 00:17:38,558 INFO L78 Accepts]: Start accepts. Automaton has 99958 states and 131587 transitions. Word has length 85 [2020-10-28 00:17:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:38,559 INFO L481 AbstractCegarLoop]: Abstraction has 99958 states and 131587 transitions. [2020-10-28 00:17:38,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:17:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 99958 states and 131587 transitions. [2020-10-28 00:17:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:17:38,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:38,578 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 00:17:38,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:17:38,578 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1484792462, now seen corresponding path program 1 times [2020-10-28 00:17:38,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:38,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765827704] [2020-10-28 00:17:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:38,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:38,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:39,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:43,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:43,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:17:43,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:17:43,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:43,845 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2020-10-28 00:17:44,152 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 00:17:44,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:44,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:44,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:44,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:44,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:17:44,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:44,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:17:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765827704] [2020-10-28 00:17:44,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:17:44,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:17:44,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764510566] [2020-10-28 00:17:44,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:17:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:17:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:17:44,191 INFO L87 Difference]: Start difference. First operand 99958 states and 131587 transitions. Second operand 11 states. [2020-10-28 00:17:44,481 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157